> Sure - but what you use, and from where, is highly correlated with wealth

Do you have an example of a case where sites rich people use were being priced higher? It's not enough to say "what you use is correlated with wealth" to support "this effectively this stops "richer" people being charged more", you need to show where websites being used by rich people were being charged for.

This does stop Facebook from giving Free Facebook (+ other services), agreed. Which is a service used by basically everyone.