imho if they actually delete your info afterwards, this is actually useful. (currently deleting a lot of accounts; opened a support ticket on one site that said that i want to delete my account; after a while without response, the login didn't work anymore so i assume they just deleted the account without confirming it to me (like, i guess that is exactly what i asked for but i'd rather get a quick email so that i can mark it as deleted in my password manager than having to check if the login still works))

Being privacy conscious is exhausting, yes.

You installed our addon? Let us just open a tab in your browser for ya so you can get to know us better!

It's good info to have if they break the law and keep sending you more emails after the "it can take X hours to remove you from the list" period.

I prefer to know for sure that they heard me.

okay, i didn't even WANT to send you ads... you're probably a TERRIBLE consumer... you'll never find another company like ME

Master, I estimate a 90% chance of you being annoyed by this notification and a 100% chance of me ignoring that statistic.