I don't know what it's like on your jurisdiction (although I'm still laughing a bit at the notion that I'm an 'older' worker at 30 something), but could part of

I don't know what it's like on your jurisdiction (although I'm still laughing a bit at the notion that I'm an 'older' worker at 30 something), but could part of the problem be that it's technically illegal/regulation risk? By which I mean, we all know that age discrimination happens, but you're not 'supposed' to do it. By setting up a website that explicitly discriminates based on age, you're exposing the employer to a verifiable action that they're taking to discriminate on age. It doesn't matter that it's an attempt to counter the widely perceived current discrimination. Imagine if you set up a website for another protected group (sex, religion, pregnant). Most companies would run a mile from that. The whole thing about structural discrimination is the plausible deniability that you're consciously doing it...