$5 is extortionate.  That's a weeks wage in some parts of the world.

A moderate user (say 1 or 2 blogs/week) needs ~5-10 accounts just to get a basic level of anonymous identity division (thus upwards of $25).  Not to mention the time and effort of getting the right form of anonymous money.  This overkill is being imposed on hundreds of thousands of users for the convenience of a few admins.

It's not worth it.  The high price in time and money has made the system inadequate for anonymous blogging.  Users will pay the price in freedom instead.