The price of an individual YouTube Premium subscription is increasing by $2 to $13.99 per month in the US for new and current customers.
This price increase is live for new subscribers as seen on youtube.com/premium. Instead of $11.99, YouTube Premium now costs $13.99/month. Meanwhile, it’s $18.99 if you’re subscribing from the iOS YouTube app.
They could set up a ko-fi or some other type of donation
I don’t think they are uploading expecting anything back, or an expectation that their channel will get big. Which is what makes their content feel more old school to begin with.