Ask HN: Any love for a math website?

The idea is it's a site with math practice problems. It's more for if you already know the math and don't want to forget it. Each question has a corresponding entry in the appendix so you're never left hanging. New problems and appendix sections get added each post. A ballpark guess is it will take about a hundred posts, which works out to four years, to cover everything.

I initially learned math because I was interested in machine learning. I started the math website because I saw, that at least for me, there was a need for a math knowledge retention website that was not being met anywhere else. I realized that while I might never be able to make any contributions to machine learning directly I might be able to help more by helping people learn and retain the math.

But so far the response has been luke warm. There are a few good guys contributing but in general it feels like there is no interest. I've emailed and wrote letters to about 30 local high school and college math departments asking if anyone would be willing to help and I got no responses.

I don't want to give up on the site but I absolutely do not want to be the moron who dumps a ton of energy into something no one has any interest in.

I've lost my ability to evaluate my devotion to this project. Your thoughts about what I should do with it are welcome.

* To be clear I'm not looking for an excuse to abandon the project. I'm more worried about creating something no one has any use for and wasting time on this instead of something more profitable.