I came to realize that the most valuable audience for form-data are freelancers and design agencies that build website for others.
Although I have quite a few site owners customers, those are most likely to use the free tier and stay with it. This is because personal site tend to have low traffic, and even lower form-submissions rate.
However, if we are able to give the right tools for site builders professionals, that would save them time and make them look even more professional to their customers, this would worth real money for them.
Our revised roadmap is targeted to this audience.