Steam Deck?

Never used Prime, so can't comment.

Hmm, didn't know that one was exclusive to Netflix. It's not a universal thing or a rule, cause San Andreas Definitive Edition, for example, is available for purchase for $20. Probably depends on what the game publisher agreed to.

Remembering how Subset Games is notoriously anti-mobile I looked into it. Turns out, as usual, they did not intend to release a mobile port, just like with FTL. They have an FTL iPad port, but refused to release an Android port due to piracy concerns, claiming it wasn't worth the effort to bother with the port. But Netflix approached them and sponsored the mobile ports for Into the Breach. In other words, if not for Netflix, the game would not have been playable on mobile at all. This likely applies to all the other Netflix exclusive games, they don't buy licenses, they sponsor the ports.

And even if they were just buying licenses and making games available only through Netflix, then go complain to the game devs, not Netflix. Devs are the ones who agreed to it when they were offered money.