Asking to be paid for your job is OK, but injecting ads in ad-free opensource service, selling user data? This is just reddit-app-moment in my opinion
Tell me you've never paid for a service, without telling me you've never paid for a service
Sync does not sell user data. It uses only the basic prerequisites for an ad service Settings shortcut: Privacy > Privacy policy
If an independent developer, who has worked on an app for 10 years, and has had their work ruined by a greedy company, turns around and makes an app for an entirely new community, within a month of losing his main source of revenue, and it's as polished, smooth, and user-friendly as can be, doesn't deserve to put food on the table, then quite simply, you're incredibly misinformed.