OKC's not voluntarily maxing out Kanter, but they'll match any offers he receives. Sam Presti traded for Kanter with the full intent of keeping him; he wouldn't have traded a first rounder for him just to rent him for 20-something games in a lost season. He's basically said as much.
Very true. But the Kanter we saw in Utah isn't the same guy as the one we saw in OKC, he was certainly better with Westbrook on his team, and the plausibility of him getting the max has risen a lot. I don't think Presti planned on giving him a full max deal when they traded for him.
But he certainly needs to prove to Durant and Westbrook that they will be willing to spend to put together a winner, in one way or another. Getting rid of Waiters and trading Adams for AB, Zeller and the pick-swap (plus maybe an early second) is a net positive for them. Assuming they keep Kanter, they'll have him, Ibaka, McGary, Morrow and Adams. Considering how desperate they're going to be this summer to prove they want a chip, using one of their excess bigs to fill their big hole at the 2 with the perfect guy in Bradley makes a ton of sense. Plus, Zeller can give them a lot of what Adams gives them, and they'll get two picks from us. Take away Adams, add those two and they'll be right in it for the finals.