Have been too busy building it.

Started with 20 students, they performed remarkably well, started adding classes each month, got into YC and raised a large seed round, solved 2 or 3 other problems that hadn’t been solved before, and now we’re ready to open the gates to more people (our acceptance rate right now is right around 2%)

It was on HN early into its life, I recall seeing it posted here. I also recall being solidly impressed by the quality of the presentation for what it was and how it worked. The value proposition clicked immediately. I think they did a pretty good job of hooking people on the concept quickly (ultimately it's pay for results, which can be a potent offer when education is increasingly expensive).

17% for 2 years not exceeding 30k