I mean, you can't even install the pro version (without ads) unless you're deep in the ass of the Google ecosystem. Someone checked and the pro version doesn't send any tracking requests (which checks with what the developer said - the ad library is not even initialized in the pro version) so it's not that bad for me.
But the part where I have to have Play Services is a huge no-no for me. So with Sync I can choose a) have spying ads or b) have different spying ads.