'based on contribution' means 'based on how useful the code you wrote is'. I have a few very rough ideas of how I want to make a system to do this, but they don't cover some of the cases I want to reward (for example, making code more concise but still readable by humans). Who knows? maybe that could be the project, or one of them, for this, and it's 'successful' when everybody agrees that the amount everybody else gotten is fair for the work they've seen put in... or something. Suggest something!
One further note, a popular option here for people buying computers is to do a short trip down to singapore (very cheap, round trip is usually 200 bucks or less, last a I checked) and get whatever and bring it back up as their personal machine, which means it can't be taxed as a 'luxury item' or whatever. That kind of thing would be an option.