Do you think this would pass the grandma test? If so I’m 100% going to host this (mainly for my mother, hence the question)

Hard agree on this. Sell software and services to companies, only sell services to end users. I believe both selling your service as a dev and selling a service behind a free app are compatible with copyleft.

“This is completle free to use, download, modify, redistribute, etc by anyone except Dave. Fuck Dave.”

I don’t know how legal that’d be, but i wouldn’t even complain.