Why would they make arbitrary decisions that run contrary to what the telemetry data shows? That just doesn't make sense.

To gain cheap trust from people by saying "trust us, the data shows it"

I can think of two reasons for the data to be made public :

- for trust and transparency purposes : It is for the same reason than an election system should be observable and reproducible, from data collection to final decision, including counting methods, etc. Otherwise it would be like "trust us, the data shows it" and you don't show the data to anyone to prove it.

- for coordination and sharing knowledge : some people might interpret the data differently, chose to focus on a niche market by doing different bets than MS, and create a complementary editor to the one from MS. MS has no obligation to support minorities, but someone else might be interested, and those minorities are detectable in the data

This may be how they develop Skype hah.

Yeah, if you're going to just do what you want, you don't need to collect telemetry to do it.