Did this start as part of the software update? I got an email saying mine would be updated tomorrow -- I pay hundreds a month for FiOS TV and Internet. If they add banners to my guide I will cancel on principal alone. I could save a ton by just using netflix and itunes for my TV and a different provider for my internet. Not like I get the speeds I'm promised from FiOS anyway.
If FiOS was a free service then, sure, put ads in but don't make me watch ads on tv, force me to stare at ugly ads in the interface and do pop-up ads when I turn on the STB just because you're greedy - that shows you don't care about your paying customers one bit. Imagine if I made you solve a riddle before you could debit my monthly payment -- doubt you'd enjoy that so don't subject us to extra ads we don't want to see.