It doesn't justify it IMO, but the features are not the point. It's about supporting the development for a (currently) smaller userbase.

Anyway, here's a screenshot

On Reddit, Sync Ultra was able to restore deleted comments and translate posts/comments in app.

I hate subscriptions as much as the next one, but I have never used Reddit, only Sync, and it is such a polished app, so I'm paying 3$ a month to keep ljdawson developing it to be even better.

So the money also goes towards keeping the developer interested and invested in his app.

I know plenty of free alternatives exists, and as of now you aren't getting anything for your money that you couldn't get elsewhere for free, but as of now I am loving having sync back.