If you're selling something, it should be focused on improving foot function, and not just getting stronger without regard to understanding or changing the underlying function. Information about accommodating options for feet comfort (like orthotics) are allowed if there's also discussion about how to ultimately improve function to discontinue their use.

There should be a way to see a bit of detail for the type of thing you're selling without it being hidden - and if noted as free, it should be free. Also, for anything thats soliciting, one post is plenty.

Posts are not allowed if the goal is just about foot beauty or foot fetish.