I think he meant your last part. You say there is a chance that LJ will collect and sell data, although you paid for premium. That's a unnecessary accusation.
If the dev tells you "information gathering is deactivated for users who pay." you won't believe them, you'll just move the goalpost and ask that they prove it by releasing their code, which they won't do because their app isn't open source and you'll conclude that because they won't prove it then we should just assume that they do.
That's JAQing off and that's exactly where you were heading with that first question. Guilty until proven innocent, but you don't accuse directly, you're Just Asking Questions.
You can stop using that for free, you can continue using it for free with ads, you can subscribe and use it without ads, you can buy lifetime access and use it without ads
There's a difference between "There's a lot tracking happening if you don't pay!" and "What's the guarantee you don't track us if we pay?" and that difference comes in the form of a hat... Made of tinfoil...