It's impressive to see how much growth a product can generate after delivering no-brainer value for a certain time. A few weeks ago, @zerofasting launched a pro membership. Yet another subscription to pay for. But hold on a second...because their strategy might have been great.

What would you do when a product that helped you so much at getting something done suddenly offers you a bit more help for a few bucks a month?

Today I've completed my 365th fast, so I guess I've been using Zero for over a year now. This app got me into fasting. That completely changed my lifestyle. And their community and content helped a lot at clarifying lots of doubts on the subject.

As soon as I got the update that Zero would start offering a monthly subscription, I instantly pushed the subscribe button. Without even checking out what would I get in return.

Why? Because of how much they've given me for free throughout this past year. No bullshit stuff. Just a dead-simple tool that helps you track your fasts. And it works great. And it teaches you stuff.

And now I can not only give them back a bit, but also learn more, and get more help to keep getting better at fasting, nutrition, and longevity.

I'm pretty sure a lot of us 700k users (actually even more, since they are above the million) entered our credit cards in autopilot.

A lesson from @zerofasting: deliver as much value as you can for as long as you can, get millions of users that love that free value, and then start charging for the extra value while keeping a free version available.

This not only applies to building a great product but building a great brand as well. Whether it's a personal brand or a company, put stuff out there, create authority and rapport, and eventually get paid.