Patreon is widely used for funding creative content because patrons are able to get rewards based on the amount of money they pledge.
This means the income has to be declared alongside your main salary or wages.
Another hurdle that you may have to overcome is wondering if your feet are good enough to make money selling photos.
Once your blog become popular, you can promote your own feet pictures and sell it your followers.
A side hustle we ourselves do is.
Of course, there are a ton more, but these communities tend to have over 500k followers on Reddit.