TBH, I get way better feedback from paying users than previously from free users. Free users like to tinker and think in terms of "what if," so they bring up all kinds of features the software should also have because it can or it would be cool. The paying users only need actual features that help their business case, and they do not care at all about these "what if" features.

I see, do you think just _starting_ with payed product would have been better? (Or starting with a product + open source tools for marketing?)

BTW good luck to scaling up to $60k / month, it will be fun

I did not plan to make the project paid at first, I would have prefered the OS / Open Core model, but it did not work out. So what I meant about the feedback was that the feedback for a free product might not help much for a paid product and vice versa. Different target groups, different priorities. On the other hand, more users, no matter if free or paid, help to detect edge case bugs better as there is a higher chance of someone stumbling on it and reporting it. In this case the first larger wave of free users did help me, yes.

Plenty of projects are source-available, but not open source, and get tons of issues, and even contributions (https://github.com/MetaMask/metamask-extension off the top of my head)