I am always in favor of programs which make education more accessible and straightforward. I've never used your platform, but it seems like it's a move in that direction.
I know that YC has also funded Lambda School, which offers a data science course, but their payment model is based primarily on ISAs. Did you consider ISA payment plans, and if so, why did you go with the flat fee? If not, do you think you would want to move to an ISA payment system as you scale?
Congratulations on the launch and best of luck!