[tomesco]

Couldn't Twilio also close and cease providing service to any accounts that initiate chargebacks?

[toomuchtodo]

They could, but customers could then file complaints with the FTC and their state’s attorney general for the fraud Twilio is enabling.

I strongly encourage Twilio customers to pursue this route if Twilio is charging them for fraudulent charges.

[Terretta]

Further, the customer has the right to dispute credit card charges thanks to the agreement between customer and card provider and between card provider and merchant.

Twilio will get in trouble with Visa/Mastercard if customers say Twilio is dropping them for disputes the card provider finds in the customers' favor.

[bredren]

These filings may add up to change at some later time, though are unlikely to provide any kind of near-term actionable remedy.

[EGreg]

Customers can do that anyway.