here's a shortwhy suju got their full album in 30 days: Twins (debut single) didn't have good public response. They were called DBSK's "leftovers," since they were just the leftover trainees that didn't make it. Plus, they were 12 members at a time when boy groups were 5 max.
Miracle (2nd promo single of the album) was literally their last chance. Leader Leeteuk cried all by himself bec he was told that if Miracle didn't do well, they were done. He didn't even tell the members--he only mentioned it offhand in 2017