Its not only that, its about anonimity also, atleast from my point of view. With google adsence they would have to deal with taxes, which is not the case with bitcoin payments.
I think they know whats best for them, whatever that reason may be.
cheers
AFAIK theymos is paying tax correctly and is responding to other legal things.
-MZ
You have no way of knowing things as private as that, at best it can be "hearsay".
Anyways, noone said he isnt either, and i doubt anyone cares, it was just a question of transparency of different ad services.
cheers