If they came up with H2H arenas that you could have say 35 people or so join, I would be happy to pay another $15. a month for it.
Set up add ons to your acct., H2H could be one of them, heck they used to give it away free, if I could set an arena up and have 35 or so of my friends join it and do as we please in there, that would be worth another $15 to me.
And it would be an untapped source of revenue to HTC, people who don't want to host an arena and aren't interested don't have to opt for the add on charge, they could even charge an additional $ 2. or $3. a month for anyone who would like to fly in the Paid H2H arenas, these charges could be all elective add on's to your acct.
It would basically be the same way you add additinal channels to your cable service.