Well, I obviously did not design the block feature, but if I had, I would make it work on recommendations. But it is only for the places where you can block them, as the explanation in the block section tells. If you don't want to see posts by an account you can block them. You can manage your blocks on this page. You can block someone via the report button next to anything they have posted.
I would do it this way, because one does not block creators. One does tell the store site you are not interested in projects of that developer and this is recommendation territory.
I do not use the recommendation feature much, there is no "I have already seen this" button or similar?