Allow users to be able to create and sell (or redistribute) their snapshot into a marketplace where others can deploy from their account. Maybe put an approval system in to prevent abuse but might be a good idea to help create images/droplets that can be deployed preconfigured.
While something like this would be a cool idea, there are HUGE security risks involved with installing someone else's clone not knowing whats on it.
I could build a Node/MongoDB stack for you to use, but before I compiled MongoDB I could add some code that sent me a copy of your database every day and no one would ever know it was there.
A system that could work would be like Linode's StackScripts, which are scripts that just run through installations of some software.
Nick Collins commented
@Filip, that's great, but we can't use them on Digital Ocean, and your servers cost 4x as much.
Filip Oščádal commented
we have such a system on www.virtualmaster.com