>login with SSO and 2FA broken.
I believe this was the result of turning off the "get rid of all the microservices " directive Elon pushed. I don't think it was malicious; some badly name microservice that was probably in charge of sending text messages or generating session tokens was shut off and the dependency chain wasn't fully understood.
>AdsUI
Anyone spending enough money for Twitter to case likely has an account manager who does everything for them. Anything that isn't in the "happy path" of the AdsUI probably gets handled by some engineer making some API calls to a prod API because it's unique enough to not worry about putting AdsUI and urgent enough where someone had to take care of it now.