Acer has had this policy for over 20 years. I bought a laptop long ago from a vendor that I had issues with and they refused to give me support because I was running Linux at the time. (I forget what distro. Probably either Mandrake or early Ubuntu.) That laptop went right back to the vendor.
Never bought anything from them since.
Funny I run across this after me and my kid had a long conversation about GLaDOS being an inspiration for The Absolute Solver from Murder Drones. (I say she is.)