For a second , I really thought Canonical lost their minds... However further reading indicates this is only an OEM measure. That is, providers such as HP,DELL,ACER,etc... will engage with Canonical to provide usage data. What provoked my knee-jerk comment above was what would be so contriving to try and count the actual number of individual new download->installs on any given platform/OS release; we'd all be writing scripts to steer it in a different direction. Yeah, kinda like US Elections.
Evolution is a million line computer program falling into place by accident.