Of course... A year from now almost every single team in the league will have cap room to sign a max deal... So im not sure who these hypothetical teams are that will be desperate to give up value to Boston to free up another 12 mil. Whatever.
A non-guaranteed is not traded to free up another 12 million. A non-guaranteed is valuable to trades so a team is more willing to make a trade with you without incurring future cap space in the process. That's the value of it, like say for arranging sign-and-trades.
Edit: I see what you mean now, you meant in us helping another team free up cap space. Yeah, we'll see.
Time to go to sleep it seems.