Bet out or check/call the river?

With a 6,7,8 out there you want to cap this against 3 opponents??? Really?

Even if it's the right move, it doesn't mesh with his flop play. I just don't understand why he doesn't raise the flop against 3 easy callers, yet goes nuts on the turn against the same amount of callers?

I think he's being greedy here by going for the added value of the turn raises. But I think it's too costly to give 3 opponents a cheap turn card.