For starters, actually trying to deliver what they promised? Get the actual hard, boring job done bigger clients wanted. The not-sexy work behind the scenes. Main problem is that it doesn't look good on paper, and Twilio hired an absolute insane amount of people.

My guess is they profited _a lot_ from the crypto hype. Exchanges sprung up right, left and centre and they all needed customer call centres etc. So Twilio grew through that. Saw super high growth and thought: All is well. All the while the "real" customers didn't get the features they needed, and quit Twilio after a 6 month trial period.