It could be coded. Anything can be coded. But it wouldn't really be worth it for either party imho, even if you used idle GPU time. Let's do some math... Let'

It could be coded. Anything can be coded. But it wouldn't really be worth it for either party imho, even if you used idle GPU time. Let's do some math... Let's say that the average GPU can mine at 1GH/s and that everybody using your screensaver had that (non-existant, overly generous) GPU. You would need ~6,000 participants participating 12 hours per day to equal the power of a single KNC Neptune ASIC miner. It would cost those 6,000 participants about $10/month just to take part. Or about $60,000 per month total wasted on electricity, for a project that would net about $15,000 in mined BTC: http://mining.thegenesisblock.com/a/cad4e45c7b http://mining.thegenesisblock.com/a/cad4e45c7b And that's if you were able to get up and running by february. In march, that $60,000 wasted on electricity would only net your charity $7,640. And in April, $3,900. Had those 6,000 participants simply donated $10 to your cause, you could purchase 6 KNC Neptune miners to mine Bitcoin for you and your cause.