I think now is a great time to remind everyone, like sync's developer, Lemmy's developers need to be paid too! The amount of time all the devs put into making lemmy exist, in my opinion, should be worth some of your money. If you can afford it, donating to the people who develop lemmy and/or the people keeping your home instance up will accelerate the incredible growth of lemmy!
The story is basically that it's a really nice looking app, but $20 to remove the ads is a little steep comparatively. They also have subscription options which rub me the wrong way. Those are just my opinions though. If it was the only app available I would probably be much more vocal but the fact is there are dozens of other apps and more in development so it's not that big of a deal.