Not surprising. The trend is the elite teams like the Spurs, Cavs and Warriors get first dibs on free agents who want to play for a "sure" winner. Ainge has improved his lot in the FA market, but I doubt he's at the market level of those other teams. The cap, of course, has a lot to say on what those teams do, but they seem to be able to fit an awful lot of guys under the cap by releasing players like ballast. Hasn't the League done something to make this tougher to do?
If Ainge wants to get into that market, he better get rid of some of the ballast the Celtics are carrying. And they do have plenty of it.