Payton has the same agent as TJ Warren and it was said that those 2 are close friends, best friends, however you want to say it. Sharing an agent with Warren and being close friends with him means that the Suns have a history with his agent and a trust built up with Warren, who could vouch for the team if Payton had doubts.
It's a possibility, but we don't know. It's all guesswork here. There was something odd about how well he played for a couple of weeks and then he just fell off completely. It could be him and he's just not any good but it could also be some behind the scenes work with McD and his agent, no one here can say for certain. Since McD pulled one over on Boston by getting JJ to cancel his workout, and how McD came up with the Boston organization working closely with Ainge, he's surely learned some tricks over the years. Ainge is one of the savviest GM's in the league and has been for well over a decade now. Not everything in the league is done above board, there are still handshake deals taking place and gray areas that teams operate in. With a low profile player like Payton, who would raise a stink if there was some sort of collusion? He wasn't throwing games. He wasn't putting in 100% effort though and the reason for that could be many of things. He did sit a few games with injuries also.