There are lots of comments and posts giving the false impression that Sync is tracking you outside of what is needed to support ads
Never noticed that, I think that the tracking because of ads is what people dislike.
When you pay to disable ads all tracking goes away
I'd actually love to! While I like open source more, I'm not opposed to the occasional non-open-source app if it's good and not shady. But I'd have to have Play Services on my phone, which I don't. I used to use Sync Pro back in the Reddit days but then I switched to a different OS to have more privacy and I had to change to Relay Pro because Sync Pro doesn't work without Play Services.