We had fraudsters using modal.com compute to solve this challenge. It's not traditional mining software so it didn't initially get flagged, but we've updated our detection to catch it now[1].
FYI something is wrong with your client side routing. From the blog post, clicking on your logo, the URL updates to the homepage but the content doesn't change til I do a full page reload.
1. https://modal.com/blog/catching-cryptominers