[kazinator]

Regarding Google, you are wrong, luckily. There is a page in Google where you can view the associations you made with third party sites and you can cancel them.

Where you find this is:

1. Go to your Google Account (e.g. www.google.com, click on your avatar, then on Manage Google Account in the popup that appears.)

2. Click on Security in the left navigation pane.

3. Scroll down, and find a box "Your connections to third-party apps & services".

That reminds me, I did a "continue with Google" on the Scribd website the other day, only to be told I had to also give them a credit card so they would let me start the free trial to view someone else's copyrighted PDF that they have no right to sell, and that I can find somewhere else. I have to revoke the association to these scumbags.

[jeffbee]

There are also sites that send you through Google signin, then they still want you to make a username and password. So you shared your email address for nothing.

[EE84M3i]

Is this against the terms of service? I seem to recall that if you do this with Apple they will ban you.