This whole Sync "issue" (is not an issue for me) has brought to light the way many people in the Lemmy communities feel about FOSS, free apps, ads even privacy, developers' compensation, etc. It's been interesting, still paid those $20 tho.
I think one of the thing that irritated some people is that this time they are not paying for more, they are paying to remove a nuisance (tracking). This is something almost only seen in proprietary apps.
I've paid for a bunch of Foss and non-foss applications through the years but never for the "remove ads" model. JuiceSSH is one such example. The base app was so useful that I knew I had to get the additional functionalities and paid a fair amount for them.
Fair enough. Getting some extra features (premium, if you will) would've been nice. But the app is still in beta, maybe in future updates the cheapest "tier" can get some. Also, as an "early buyer" I'm aware that I'm basically paying to support the dev, because the app is still incomplete.