Although for some of us this is a well-known problem, it has appeared again with the release of DOOM: The Dark Ages so it's worth a quick PSA to remind people about Denuvo activation limits with Proton on Linux, SteamOS / Steam Deck.
One more reason why I don't see Proton as a replacement for official native support. Things can and will break, and they'll say it's not their problem because they only support Windows.
That's why Proton is in continuous development. When it's broken it's usually a matter of days or weeks before it's fixed. If the dev is going to ban you for the offense of using a compatibility layer then that's grounds for a refund (at least on Steam).
I just meant that it's funny that you said that it's a good thing that they use rolling releases because it occasionally breaks and they can fix it in a few days or so.
Usually rolling releases are good for continuous improvements, but not for you ,🤷