LJ,
I too am a reddit refugee. I like what you've done with this place.
:)
But we have to talk about pricing and privacy.
Pricing: tbh I see not much wrong with the 20 bucks. But I do think that you should take 2 bucks from that and donate one to the lemmy org (this is not reddit, nobody is getting paid, the lemmy devs also need an incentive) and the other one to lemmy.world because that's the instance you're dumping us all on. Hosting is not free, lemmy.world costs money and probably a lot of time to run. Being a reddit admin is a payed job, being Ruud at lemmy.world most certainly is not.
In this way "we" are giving back to the Foss community and it should silence a lot of critics. In that way you don't look like the evil capitalist earning a quick buck over the back of free labour of the foss community. I think that's 2 bucks well spent.
Edit: same goes for ultra subscriptions of course, a similar percentage should be fed back to the lemmy org and lemmy.world.
Privacy: since you're using admob and I forgot the other one, privacy is out the window. That's a big issue for the Foss community we're all relying on. Maybe it's wise to point out that once you pay for sync all that tracking that admob and the other one (not you I hope) does is out the window.
Edit edit: maybe you could also add a yearly reminder to donate to the users favourite lemmy instance.