They can invite them all they want. I’m sure SEC or Big 10 would love to have them and Clemson would love to go there.
But if Texas and ESPN don’t have the cash to get UT out early there’s no way anybody is ponying up to get Clemson moved.
Agree no one can "break" a GoR. But it could potentially be "cancelled".
If a majority of teams vote to dissolve the conference, thus cancelling the GoR. Remember, that is what ESPN tried to do to the Big12 - scare a few teams into bailing for the "safety" of the AAC and voting with OuT to disband the Big12. Luckily everyone realized that the "safety" was no better than the worst-case scenario, so they locked arms and stuck together.
Most think the B1G/Fox would be happy to grab a few of the ACC to expand (let's say 4). And if ESPN got nervous, and/or mathed out that paying 4 teams $80M each is better than paying 14 teams $30M each... it could happen.
I'd guess the odds of it happening are like 10% in the next couple years, but as the GoR end gets closer those odds go up as everyone has more to lose.