It seems not a week goes by where a huge company is not pointing to the rise of free ad-supported streaming TV (FAST) platforms as proof of a healthy and diversifying video advertising market. FAST certainly has its place in the ecosystem, but it seems any initial lofty ambitions of it becoming a serious competitor to the SVoD giants has since subsided, with most platforms settling for ‘lean-back’ content fodder. This week, the FAST frenzy continues with both Google and Warner Bros Discovery (see separate story on WBD) seemingly diving into the format, although the former has been far sneakier about it. According to some detective work from 9to5Google, Google TV is secretly preparing to add FAST channels to its…