[kvia]

Twitter is a company, not a court of law. Trump tarnished their reputation like nobody else, so they ceased doing business with him when it was convenient. This was facilitated by him flagrantly violating their rules for years, culminating in the riot he incited via their platform. It's as simple as that.

[gsich]

Tarnished? No.

Twitter was in the news every day. They profited massively, but now that his presidency is over there is no interest anymore.

[kvia]

Precisely. They can have their cake and eat it too. That they attracted a lot of eyeballs while he was in office doesn't mean they want to be "that website that Trump rants on" forever.