As a former Reddit user of sync pro. I'm one of those people who just enjoys the UI so much that I'm willing to support the dev. It's easy to say "pay for it" to make it look worse, but I appreciate the work he's put into it.
I agree, there is nothing wrong with getting paid for your work. It is a high quality app which should be appreciated by the lemmy community since it helps them grow.
I legitimately could not get into Lemmy with any of the other apps. They just all felt wrong.
But I used Lemmy more on the first day the app came out than I did since I made my account two months ago. Best part is it feels just like Sync for Reddit did, including all the great features.
The only reason I haven't paid yet for no ads is that I'm waiting to see how much I like it. I might even pay for Ultra if they provide a discount for buying it with the Reddit app.