I believe that primedice had it a while ago but decided to take it out again. But now they've got their own copycat forum(forum.primedice.com), there is a subforum dedicated to people taking and making pvp bets, no matter whether it's sportsbetting or other random events. https://www.bitcoinrush.io/ is also a good site to play on if you want to play pvp. They do take a cut from the bets though. Also don't play with too much, it's good that you're only betting micro. The site admin isn't that active.