Chainweasel

Wait, they’re not letting you stream because of your OS? That’s bullshit, I’d pirate it on principal at that point. No sense in waisting time trying to get your browser to report a different OS to work around it.

If they’re saying “own” on their advertisements then they should be required to refund you when they eventually have to take it away. I’m pretty sure “ownership” has a legal definition and it’s probably not too ambiguous.
It should at least be considered false advertising if they can’t guarantee access permanently.