Trump would probably get banned at some point, especially if his tweets start to endanger rank-and-file Twitter employees (inspiring death threats, etc.). How likely is he to get injunctive relief if he gets banned?
I don't think Trump has thought this conflict through completely.
...and it might work. These sorts of stories play riiiight to the centrist/libertarian/independents - whom he's grooming to not be afraid of showing up in person to the election booth in November.