I dunno about colluding to centralize inference, but "we encrypted the power firmware and only gave microsoft the keys" certainly reads as colluding to keep people on windows artificially
edit: even more important for mobile computers
That them trying to protect IP around something very profitable isn't crazy. That not being fully supported in Linux, when the product was literally designed around Windows, also isn't crazy or really evidence of anything, including evil (see the whole fucking history of Linux compatibility of made-for-Windows hardware).
Maybe let them cook.
It obviously can't be because of ulterior motives!