I believe you can get pretty affordable Windows VMs these days, however. I'm not sure that blocking wine really accomplishes a lot. (There are also companies that sell access to consumer Windows PCs on consumer ISPs these days. If you don't play Hearthstone, you probably don't mind $10/month in free money for letting someone bot Hearthstone on your computer. And it's not like Blizzard is going to say "look, enough Comcast, shut these people down or else we lock all Comcast customers out of battle.net". It's pretty tough to run a gaming client these days, I would imagine. So so much stuff is totally out of your control. I do not envy their engineers at all!)
It actually was a major issue for Valve with TF2. It used to be you could run the game headless and have it join a server to idle farm items for you. In college my roommate and I each bought about 3 copies of the game then ran them headless in VMs to try and farm hats. Never got anything super great sadly.
I believe you can get pretty affordable Windows VMs these days, however. I'm not sure that blocking wine really accomplishes a lot. (There are also companies that sell access to consumer Windows PCs on consumer ISPs these days. If you don't play Hearthstone, you probably don't mind $10/month in free money for letting someone bot Hearthstone on your computer. And it's not like Blizzard is going to say "look, enough Comcast, shut these people down or else we lock all Comcast customers out of battle.net". It's pretty tough to run a gaming client these days, I would imagine. So so much stuff is totally out of your control. I do not envy their engineers at all!)