The more I think on it, the worse it sounds. How exactly are they tracking installs? We need it to be clear on what they're tracking, otherwise that's a big privacy red flag.
And how accurate will it be? What about pirated installs? Charity keys? Etc. So many bits unclear.
@gamingonlinux What about families who install a single purchase on multiple computers and consoles? And yes, what are they tracking to identify a unique install?