I think it’s potentially attractive to people for two reasons. One is that it’s “safer” than a traditional loan: if the education doesn’t work out and you don’t

I think it’s potentially attractive to people for two reasons. One is that it’s “safer” than a traditional loan: if the education doesn’t work out and you don’t get a good job, well, you only have to pay a percentage of your income, so your low wage job is still okay. Or maybe it’s contingent on a certain type of job, so you don’t have to pay anything. Second reason is that ostensibly, it aligns incentives. The education company only gets paid if you do, so they’re highly incentivized to provide effective education that actually lands you a good job. But of course, there’s also downsides, as the twitter OP states.