Desura has launched a new Alpha Funding initiative very similar to other crowdfunding projects like Kickstarter and 8 bit Funding. 5 Indie games have been selected as launch titles and out of which 3 will have Linux versions in future.
Below is an excerpt from official announcement:
The idea behind alphafunding is simple, fans get instant access to their favorite games with the understanding that the game might be buggy and isn’t complete – but frequent updates will add polish over time. The developers can then fund the games continued creation, giving supporters early access to the latest and greatest content.