Interesting thought - I don't think it's needed at the moment, since the guys have just opened a new way to support the game before early access using itch.io (visit http://www.eotugame.com and click "Support the Development" to use it).
I know a lot of content creators are drifting towards business models like Patreon, mainly due to poor ad revenue from services like Youtube. It's not strictly relevant to Slug Disco just yet, I feel, but it's an interesting idea.