Why don't you do ads on your main channel? I know it's annoying for viewers, but it'll make you more money, and I'm pretty sure you get a lot of partnership and ad requests.
I don't want to do ads on my main channel, because even though I understand it'll make me money short-term — someone offered me $100,000 the other day for a dedicated integrated sponsorship video — I did the math on the trade-off. Taking one of those a year would boost my annual revenue by maybe 2-3%. The question is whether it would hurt new signups by more than that 2-3%, and I think it would, because people are less trusting of someone once they start seeing them do sponsorships and dedicated posts on a long-form channel like YouTube. So I'd rather not risk that trust hit for a relatively small revenue bump.