Crowdfunding isn't just about one-time projects. Platforms like Kickstarter and IndieGoGo are designed to fund one-time projects, but one key service this article didn't mention is Patreon:
http://www.patreon.com/ . It's designed to provide continuous crowdfunding based on a patronage model: having seen existing work from a given person, you choose to provide them with a given amount of funding per month or per creative work produced, and you get some ongoing benefit based on your level of patronage.