I wonder if the $300 is sort of like extra startup money to get better hardware, infrastructure, software improvements in the short term. I honestly have no idea. I pop on there sometimes to watch the full length videos from YouTube and there is some really great content, but not necessarily enough. Their UI/apps could definitely use some work, though I have not checked recently.
I really hope they continue to run and it looks like I need to catch up on some content. I took a break from most YouTube/TV/etc. I cancelled all of my other subscriptions, but I have no reason to not support a company like Nebula, especially at their price points.
I am not going to debate the ethics of piracy or people's justifications for or against it. It isn't productive. I do think this is an instance where you are better off paying for a month than spending a lot of time trying to get it another way. Sometimes, I like to put things in the perspective of I make X dollars an hour, how many man hours did I spend to do X task? Cost benefit analysis. This isn't always practical, thus the "sometimes".