It's funny since everyone is saying yes, but if you need to pay monthly for it, I bet any amount that 90% or more will say there shouldn't be one. Lel.
P.S. I think the only anime that would would benefit and give profit to the channel would be DBZ. Since its undoubtedly the most popular anime in the world - and of course in USA. So, if it'd just be a marathon of DBZ; 24/7, I would defs pay for it.