This spec literally defines a way of doing so without attribution - the various confirmation mechanisms are all done using stateless and cookieless network requests - all the site operator gets is confirmation that someone did something.
The alternative is a browser breaking all the tracking mechanisms and then getting blocked because it’s “blocking ads”.
This provides an API that allows ads to work, while also allowing a browser to block all the tracking techniques currently being used.
That way web sites can have a revenue stream without gratuitously violating their reader’s privacy.