The root problem seems to be that most students don't end up finding jobs.
According to leaks, only 27% of graduates ended up making over $50k, which is the threshold where they had to pay back the company. Each student costs the company $13k, with $2,500 in CAC alone. At the time, the ISAs maxed out at $30k, which you'd hit way below the FAANG scale of wages.
https://www.businessinsider.com/lambda-school-promised-lucra...
Let's say you have a cohort of 100 students. It costs $1.3m to train them. 73 pay back $0. Even if the remaining 27 end up in FAANG jobs, you only make back $810k.