Tbh, I’d rather they use the money to make Linux distros better. Valve made the Steam deck a winner not through advertising, but through making a good quality product and supporting the ecosystem.
I have no interest in people making Linux popular beyond the minimum required to get companies to support it. If it’s good, people will naturally learn about it through word of mouth.
Also, directly attacking Microsoft feels like they could get sued for libel or something like that.