AlgoMonster (https://algo.monster) helps software engineers prepare for technical interviews in the fastest way possible. Think of it as test prep for software engineers. It started from the founder's personal frustration of the lack of good resources for preparing technical interviews. The founders are Google engineers with many years of tech interview expertise.
We offer 20% commission and each sale is $79 (we adjust pricing up as we add more content). AlgoMonster has an average conversion of ~4%.