I know that BorisB and I, among others, have been accused of being employed by Entourage because we made positive posts about a product we are fans of. It's funny and sad how people cannot believe that anything without an "i" in front of it can have genuine fans.

Guerilla marketing campaigns certainly exist, but I haven't seen any whiff of it here, and it would be a very unusual (and expensive!) thing for a startup to do.