I would definitely support one-time donations via PayPal and a monthly tiered Patreon. As someone mentioned before I like the idea of a Patreon tier that would be able to vote on what modules and features are added next. Personally I would support a monthly Patreon.
I would also not be opposed to a marketplace where developers could make money from their modules and support the modules that they create. Similar to what WordPress has done with plugins and themes.