With proper Federation the spread literally doesn’t matter so no idea what you mean with that but I agree, the none sustaiable and unethical ad format won’t be possible, no ads is something entirely different tho because sponsor segments and affiliate links would still work just as well. You are right that many wouldn’t choose that path but I am sure a lot would do so if there was a good option, at leadt a lot of the ones I like to watch but currently Peertube is such a pain to use that not even I as geek and foss enthusiast do so! :(