After seeing the Black and White’s subway billboard today, I wanted to know more about this culture of publicizing ships in Korea, so I started to look into it. Here’s a summary of what I found (check thread for details). All sources will be cited. +
K Pop Metro ads are very commonplace

BTS had the most metro ads of any K Pop group

Jungkook had the most Metro ads of any K Pop idol

Ads are taken out for birthdays and anni

Entire trains have been decorated as ads

Jikook anni ads go way back

There are also Taekook ads

+
BTS holds the record for Metro ads at 227.

Jungkook as the idol with the most individual billboards, with 46 ads.

BTS' V with 31 ads.

https://www.sbs.com.au/popasia/blog/2020/04/08/10-k-pop-artists-most-fan-bought-seoul-subway-billboards-2019
Ads are taken out for birthdays and anniversaries of many K Pop idols.

Sometimes entire trains are decorated for a member's birthdays.

Below are the birthday trains for 2019 Jungkook and 2019 Jimin.

https://twitter.com/7thpromise/status/1167385318049361920
https://twitter.com/fate_jimin/status/1179426787509653507
Ads are taken out for birthdays and anniversaries of many K Pop idols. Sometimes entire trains are decorated for a member's birthdays. Below are the birthday trains for 2019 Jungkook and 2019 Jimin. https://twitter.com/7thpromise/status/1167385318049361920 https://twitter.com/fate_jimin/status/1179426787509653507
Ads are taken out for birthdays and anniversaries of many K Pop idols. Sometimes entire trains are decorated for a member's birthdays. Below are the birthday trains for 2019 Jungkook and 2019 Jimin. https://twitter.com/7thpromise/status/1167385318049361920 https://twitter.com/fate_jimin/status/1179426787509653507
Jimin's fansites go all out for his birthday, setting records!

First Idol in Korea whose birthday support that involved ALL 702 PDV & LED &DID screens in all routes & stations of Seoul Metro in 2019.

https://twitter.com/JIMINBAR_CHINA/status/1160192550944137219
Jikook / Kookmin has been celebrated for several years in both Seoul and Busan.

https://twitter.com/BAIDUkookminbar/status/997116435812896768
For the 6th anniversary, a fan site took out ads in the subway, put up flags on the street and even put ads in the airport.

https://twitter.com/BAIDUkookminbar/status/1131197386112372737
For the 6th anniversary, a fan site took out ads in the subway, put up flags on the street and even put ads in the airport. https://twitter.com/BAIDUkookminbar/status/1131197386112372737
For the 6th anniversary, a fan site took out ads in the subway, put up flags on the street and even put ads in the airport. https://twitter.com/BAIDUkookminbar/status/1131197386112372737
For the 6th anniversary, a fan site took out ads in the subway, put up flags on the street and even put ads in the airport. https://twitter.com/BAIDUkookminbar/status/1131197386112372737
For the 6th anniversary, a fan site took out ads in the subway, put up flags on the street and even put ads in the airport. https://twitter.com/BAIDUkookminbar/status/1131197386112372737
2020 is the 7th anniversary of BTS and there are Jikook ads from multiple fan sites.

https://twitter.com/today_koookmin/status/1266292407429033992
https://twitter.com/BAIDUkookminbar/status/1263038790945275905
2020 is the 7th anniversary of BTS and there are Jikook ads from multiple fan sites. https://twitter.com/today_koookmin/status/1266292407429033992 https://twitter.com/BAIDUkookminbar/status/1263038790945275905
2020 is the 7th anniversary of BTS and there are Jikook ads from multiple fan sites. https://twitter.com/today_koookmin/status/1266292407429033992 https://twitter.com/BAIDUkookminbar/status/1263038790945275905
I found other "ship" ads too: Taegi, Sope and several Taekook.

https://www.pinterest.ie/pin/304485624802005995/
https://twitter.com/ByMySide_KookV/status/1133498983270297600
https://twitter.com/anjeljimin/status/1192350623368282112
I found other "ship" ads too: Taegi, Sope and several Taekook. https://www.pinterest.ie/pin/304485624802005995/ https://twitter.com/ByMySide_KookV/status/1133498983270297600 https://twitter.com/anjeljimin/status/1192350623368282112
I found other "ship" ads too: Taegi, Sope and several Taekook. https://www.pinterest.ie/pin/304485624802005995/ https://twitter.com/ByMySide_KookV/status/1133498983270297600 https://twitter.com/anjeljimin/status/1192350623368282112
I found other "ship" ads too: Taegi, Sope and several Taekook. https://www.pinterest.ie/pin/304485624802005995/ https://twitter.com/ByMySide_KookV/status/1133498983270297600 https://twitter.com/anjeljimin/status/1192350623368282112
I found other "ship" ads too: Taegi, Sope and several Taekook. https://www.pinterest.ie/pin/304485624802005995/ https://twitter.com/ByMySide_KookV/status/1133498983270297600 https://twitter.com/anjeljimin/status/1192350623368282112
The interesting thing was the responses that some of these ads got. I will let you form your own conclusion but here are some screen shots from a Taekook ad.

https://twitter.com/pls_9597/status/1190038590807584770
The interesting thing was the responses that some of these ads got. I will let you form your own conclusion but here are some screen shots from a Taekook ad. https://twitter.com/pls_9597/status/1190038590807584770
The interesting thing was the responses that some of these ads got. I will let you form your own conclusion but here are some screen shots from a Taekook ad. https://twitter.com/pls_9597/status/1190038590807584770
Compare this to the responses from Black and White's most recent Jikook ad.

Why do you think people responded so differently? (All the Korean translate to positive things like thank you or beautiful.)
Compare this to the responses from Black and White's most recent Jikook ad. Why do you think people responded so differently? (All the Korean translate to positive things like thank you or beautiful.)
Compare this to the responses from Black and White's most recent Jikook ad. Why do you think people responded so differently? (All the Korean translate to positive things like thank you or beautiful.)
I can't really draw a scientific or absolute conclusion from this but I think it is an interesting observation and I wanted to share what I found. You can draw your own conclusions and if want to chat, feel free to DM me.

Here are some other ads I found just for fun.
I can't really draw a scientific or absolute conclusion from this but I think it is an interesting observation and I wanted to share what I found. You can draw your own conclusions and if want to chat, feel free to DM me. Here are some other ads I found just for fun.
I can't really draw a scientific or absolute conclusion from this but I think it is an interesting observation and I wanted to share what I found. You can draw your own conclusions and if want to chat, feel free to DM me. Here are some other ads I found just for fun.
I can't really draw a scientific or absolute conclusion from this but I think it is an interesting observation and I wanted to share what I found. You can draw your own conclusions and if want to chat, feel free to DM me. Here are some other ads I found just for fun.
I can't really draw a scientific or absolute conclusion from this but I think it is an interesting observation and I wanted to share what I found. You can draw your own conclusions and if want to chat, feel free to DM me. Here are some other ads I found just for fun.
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