Rondo might actually be in a decent position to save face with the salary cap increase on the horizon.
He can spin it that he just took a one year deal, so he can cash in '17 when the cap is expected to rise significantly. Then he just has to pick a team without any real cap space, saying he really wanted to play for Indiana (or whoever) but since they didn't have enough cap room, that's why he settled for that one year, pennies-on-the-dollar contract. It was just the right fit, and he doesn't care about money, and just wants to win, and he'll make it up on the next contract, blah, blah, blah. Then he just has to play like Celtic Playoff Rondo all year to redeem himself.
Of course we'll all know the real reason, but it could be an easy spin.