Does that mean HBO are giving Linux users a license to pirate because that's cheaper for HBO than supporting them? Where do I sign up?

What's beyond ridiculous is that I get HBO Max with my internet but I can't use it. Great...

Your phone has an app.

Awesome, I get to view these amazing high-budget shows on a crappy 6" screen.

Yep, you have no right to HBO, you only have the permission. If you are unsatisfied with your available options, I guess that's your problem not theirs.

The only sad thing here is that most people in the US don't have the possibility of choosing a different ISP/Cable provider because they are all monopolies.

I was just about to say lucky that I'm not living in a totalitarian military dictatorship like North Korea or the US and I can freely choose my service provider and that service provider doesn't just lease from a company which has a monopoly deal with the government.

Cast it to a TV screen or use a iPad or an Android tablet?

Making sure your website doesn't explode should have minimal cost.

4% of revenue at this scale, minus server costs, is an enormous amount of profit. Supporting one extra browser/OS combo should take less than one dev.