That's pretty horrible.
But I have to ask ... since my understanding is that hiring companies make you redo the technical interviews again, what is the point of doing the Triplebyte interview process at all?
Also related, there was a startup that was scraping your Linkedin status and sending that to employers who subscribed, effectively doing the same thing Triplebyte is planning to do. There was quite an uproar over that, too.
Speaking of Linkedin, your employer can view your profile if it's public, so again, similar problem to what Triplebyte is doing.
[1] and they enforce this—they specifically ask the candidate to report any technical questions asked during the phone call.
When I've gone to FAANG companies, I've gone through a lot more per company to receive an offer. Multiple visits to each campus, lunches, technical sessions, spanning potentially weeks or months. Overall I think TB saved a lot of time and I really enjoyed the process.
Of course, now they've really shot themselves in the foot.