Hell it’s more attributable.
Otherwise, why wouldn’t I just try the last entries from that list?
Now sure if the identity provider and the site work together they could negate the anonymity, but given that for the identity provider anonymisation would be the key selling feature they wouldn’t want to risk that. Mullvad I’m sure would be trustworthy enough.
Although we all be happy to se more competition, using an ad blocker on Google sites (and G-add financed-sites) have no positive effect for the competitors.
Don’t take me wrong, I hate Ads and Google methods but we can’t all rob the same store and hope there will be infinite food on the shelves and that the next store will benefit from that.
Adverts have no positive effects for anyone other than the advertising firm. They cost the viewer more than the provide the advertiser