Why is this necessary at all?
I need the user to have an account so I know who rated what games and who requested what recommendations. To do that, I need to build a system on my webpage for users to be able create a new account, so I need to store their credentials, which I don’t want to do. Or I can use an already existing account from the game store.
Connecting my account to your site gives you access to large amounts of personal information, even if you’re not using it.
I don’t think that’s true. Or at least this is true if you allow that. When you try to log in with your itch.io account onthe Gamescovery page, they will tell you what data will be accessible to me. See the following screenshot as example:
