Are you asking why Twitter does not have to tell you why it has censored you? I’m guessing it’s due to the new arrogance of the left. Most corporations run by lefties, don’t have much regard or respect for conservatives due to their school time indoctrinations.
Google has become that way too. Even PayPal has been known to ban certain conservative people from using their services (Lara Loomer).
These should be declared as utilities, open to all.
They rarely suffer any negative consequence for their bigotry. That may change as more conservatives learn to use the court system for their own bidding just as the Libs have always done.
When you see what President Trump has done to the makeup of the Federal Courts, lawfare will look like a lot of fun for the right.
Public accommodations.