Remember clearly the first time that message popped up, asking for $1/year, and I think you could basically "skip for now" and then it'd pop back up again later again. I remember thinking how brilliant it was, just hitting 100K active users in a year would be $100K, more than enough for a person, and at their scale they'd make it work long-term. Then of course eventually the $20B purchase happened and it became a product in someone's portfolio instead essentially.