Couldn't Twilio also close and cease providing service to any accounts that initiate chargebacks?
I strongly encourage Twilio customers to pursue this route if Twilio is charging them for fraudulent charges.
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.
This isn't true. Visa/Mastercard care about your chargeback rate. You can block a customer who's done a chargeback. I'm sure the card networks have rules around what you cannot do as a result of a chargeback but you can stop providing services to a customer who has done a chargeback.
To be clear, my views on this are not legal counsel, they are simply from having worked in this area for a decade before becoming CTO at a global bank.
That’s like nuclear meltdown.