The votes might be the one from his instance (I’ve no time to check right now), as I’ve understanded, upvotes and down votes are instance specific, so, this means for the same post: Instance a show 10 upvotes Instance b show 5 (The post is in instance a) Which means a admin know who are the 10 people but can’t know who are the 5 from instance b, and instance b admin know who are his 5 people and not the 10 from instance a. (I might be wrong, if it’s the case please correct me)
Monthly fee for everyone or you mean freemium? Freemium in my opinion wont be enough to cover the cost, because works well only with services with low cost per-user. And monthly fee for everyone is a very hight incentive of not using YouTube.