nostr:npub1m26pksxajls9yrmtwx0zcvptzcx33t8ht8mfc5sdpcje0tp4nz8q9l2jhh I use the service professionally, and decided to pay, annually, at the highest level they made available. My (1-man-band) company pays for it (as it's a legitimate company expense) and I like that I get to choose which companies my corporate GBPs support; especially when their values appear to align with my own. 

On your other questions: you might like to read this financial report from earlier this year, on the sourcehut blog: https://sourcehut.org/blog/2023-03-27-2022-financial-report/