NOt sure I understand how anyone could have a problem with that.

I actually once switched to netlify cause their free tier allows commercial sites, the websites i made in this situation are pretty local and small and I doubt vercel would even notice but it was easier to just switch to netlify than research all the reasons why those websites can be considered commercial.

non-profits?

I read earlier today on their website that they were offering free plans to open source projects, aybe they also do it for non profit

Correct, we support a number of non-profits as well.