I don't seem to be understanding the finances behind it.

The agreement is by completing the program, you pay 15% of your salary for 2 years as long as you're receiving more than $40,000. However, it also says it's capped at $30,000 total over that period.

If you pay someone a $2,000 a month salary for 21 weeks, that's already $42,000. Where's the extra $12,000 coming from?

I'm just trying to understand since if I agree to quit my "current job" and rely on another company to help pay for me, I'm relying on that company to not pull the rug out from under me when I'm half-way through the program. How do I know this is a reliable and sustainable program?

Interesting concept! That's just the first question that comes to mind for me.