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a cpu donation page where games are played to pass time while allowing a browser miner to run?

maybe solve some captcha's or steem dice mining as well :)

Not an ICO, that's like asking for trouble now. I can't see the problem with having ads for people that aren't logged in. They could also be for those that log in and want to help. Anyone that's logged in and doesn't want to see them, could have an opt out.