I donated in the past for a full year, but I know many others never did. And the app is constantly out of work, so no matter if one donates or doesn't the app will be still not working and you can't change that. And I agree, I don't see anything wrong with ads, if it helps. Also, if maintaining the chat is so costly, wouldn't it be easier to just register Christian Chat on telegram and make a group chat there, where anyone could join and communicate with one another? - I would join.