Some time ago I tried out the functionality to add to my account as hidden. That worked. I didn't like the (free) gene so I removed it and such.

However now the game pops up in recommendations saying that other games are recommended because I have played the game, which seems to defeat the whole purpose of hiding it in first place.

Ignoring said game also doesn't remove it from being used for recommending other games based on having played it.

So in my opinion these things should happen:

Hidden games should never be used for recommendations. Also eher uninstalling, etc.

There should be an option to permanently remove games from Ann account.

Games one ignored shouldn't be used as a basis for recommending other games.

Overall games that were intentionally hidden should not be shown in any context.