Set the routing mark with hotspot=auth and try...
Nope, does not work at all, I've tried that before I post this thread
ERROR: Not found
While trying to retrieve the URL http://www.google.com
Network is unreachable
You cache administrator is webmaster
Generated blablabla (Mikrotik HttpProxy)
I'm running v6.3, can this be another bug in a old broken feature (past experience also), the word on the street is that mikrotik release new versions and broke old features so that they can make more versions so that people will have to get new licenses soon if they want to keep upgrading their older units