Presumably Twitter got annoyed at the fees. Twilio charges $0.0079 per US outgoing message. Twitter claimed 330M monthly active users. If each of them got one

Presumably Twitter got annoyed at the fees. Twilio charges $0.0079 per US outgoing message. Twitter claimed 330M monthly active users. If each of them got one SMS per month, that’s $2.6M per month. For a company that’s trying to avoid paying rent and skimping on janitorial services, that’s a lot of money. Of course, Twitter surely pays a lot less than the Twilio advertised price. But a cost center is a cost center, and Twitter really wants to get rid of cost centers right now.