It becomes your problem when the thing you want to see is not available because it shut down.
Whether or not they can make money on traditional advertising is a complex thing when I’m not sure what you mean by traditional advertising. Can a website offer traditional advertising? If so how do you think the existence of ad blockers has contributed to its decline? I remember when TiVo was a big thing we started seeing banners at the bottom of shows advertising other shows. Seems like a pretty clear correlation to me.
And they didn’t sign a contract and are under no obligation to serve you content. That road goes both ways. Is a contractual obligation the only way you deal with something you don’t like to get to something you do?