but did notice that it was low-quality slop
If you want to make a case for the existence of non-slop AI output, this is not a good example to use
If they considered it slop, they would not have bought it in the first place.
So that asset creator is the perfect example for non slop ai. There is a market for this. The account is doing this for 4 years now. And you do not get 500 followers for creating slop.
There are literally hundreds of presumably hobby game developers following to be notified of new "slop" to buy. You seriously think they line up to buy slop?