If you pay for Sync, IMO you should give to the instance which hosts your lemmy account as well as to the Lemmy dev(s) (yes Dessalines is a tankie, but you should separate the artist from the person)

I would love to pay for Sync, alas I don't have Google services on my phone. I know this day will never come, but a non Google pro version would be great (some pro versions I bought without Google play: Folder sync pro, Tasker, Fairemail, KWGT, Poweramp, xprivacy...)

The app is really great