Cloud Patron is described as 'open source membership platform that enables fans to support creators with monthly subscriptions. Creators can customize support levels, set goals, and post updates for their patrons. Supports monthly credit card billing using Stripe'. There are more than 25 alternatives to Cloud Patron for a variety of platforms, including Online / Web-based, Android, iPhone, SaaS and Self-Hosted solutions. The best alternative is Liberapay, which is both free and Open Source. Other great apps like Cloud Patron 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.