15 euros is not "this sort of money". But I did donate to Mozilla! :) And I am planning to donate to my instance owner as well.
I got it for 15. Is it expensive for ad removal? Yes. Is it too expensive? No, for me personally no. I wanted to support the dev and I did it. Also It's the only app I am going to use until Lemmy is no more.
One-time payment for ad-free is live in Beta 25. It's $19.99 USD. Update your app if you don't see it.
If the ads sdk is not initialized for the paid version, and no data is collected, then there is no issue.
I know Lemmy does not put ads duh.