Devcoin 2.0 indeed.
Which also means you have to release more information on how the spending of this 50% will be decided. Unless you are a bunch of fullblown geniuses, there is just no way you can get that part right. Also, the 50% cap is entirely arbitrary.
It is quite clear that a devcoin type thing CAN work - in principle. A kind of coin that effectively self-organizes into a society. We're talking DNA. However, how can one develop such a coin?
Either make a Devcoin 3.0 that aims solely to create a new successful coin. The reward for adopting the first coin and becoming a part of the revolutionary creation-project will come (insert ingenious solution here) when the second coin becomes successful.
Or just open-source the revolutionary creation-project of the DNA-like coin that can self-organize into a society.
There is something biblical about all of this isn't there? The second coming of the Creatørcoin that morphs into a lifelike organism, having risen from the swamp of its faithful who in due time will enter into the kingdom of Creatørcoin.