But those companies can and will fight back with legal means. For example, if I'm a label, non-disparagement clauses are the norm going forward. You don't bring our business in front of (from my perspective) the mob on Twitter. Also, I don't sign a deal unless I get the copyrights, the mechanical rights, the sync rights, the performance rights, and the songwriter rights. I need all the rights. The artist can keep the a perpetual, non-transferrable license to the performance right, but that's it. I bet this won't even cost them that much more, because until Ms. Swift flipped the script, this was kind of de facto understanding of what the master rights meant. This lateral move by Ms. Swift (apparently) caught everyone off guard.
She is a genius, though. I'm not sure if what she did was fair, but apparently this was war, and there's no fairness in war.