This is actually really motivating.

I'm 15 and building an edtech product with my friends, and we noticed 2 employees from a very big edtech company (direct competitor) signed up (with company email addresses) and tested some features out. I don't know if my site will ever be anything more than a hobby project, but the fact that two employees of the site that inspired my own signed up makes me feel like we might be doing something right! I just wonder how they found it.