MYM is described as 'French "premium social media" app that allows content creators, models, to earn money on a subscription basis or via direct sales of content'. There are more than 10 alternatives to MYM, not only websites but also apps for a variety of platforms, including Android, iPhone, Android Tablet and iPad. The best alternative is Liberapay, which is both free and Open Source. Other great sites and apps similar to MYM are Open Collective (Freemium, Open Source), Patreon (Paid), Flattr (Paid) and Ko-fi (Freemium).
Flattr is a social micropayment service, that makes it easy for you to "flatter" things on the internet that you like. When you're registered to Flattr, you pay a small monthly fee of your own choosing.
OnlyFans is the social platform revolutionizing creator and fan connections. The site is inclusive of artists and content creators from all genres and allows them to monetize their content while developing authentic relationships with their fanbase.