I had a problem finding the rules for the use of a Stripe Account which is what governs their use, but I did find this:
To the extent that you become aware of a Connected Account being engaged in any fraudulent, unlawful, deceptive or ABUSIVE activity, you must promptly notify Stripe. Once notified by you, Stripe will use commercially reasonable efforts to promptly determine whether to terminate or suspend any such account’s access to the Services.
https://stripe.com/legal/connect
If Stripe determined the heckling of Psaki to be abusive, and they could have, they can pull the plug by the agreement signed. But I can find nothing to determine why that plug was pulled. This is just a guess at best but it makes what they did legal by the contract both signed.
wy69
Stripe would have to hold other businesses to the same level, or be sued.