Thank you for the reply and the link to the post.
I think I see it clearer now. So the APR is like the bank would give you money to counter the inflation of the currency. Of course, that does not exist in the non-crypto world, so it is no interest but some kind of little counter inflation to compensate you (at least a little) for the losses due to the inflation pool.

I am not sure if I understood this correctly, but it does make sense in my mind now.