Maybe mini-payments would be better than micro-payments, so long as there's a good it-just-works technology for doing them that minimizes user interaction.
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I think it is littered with the corpses of tipping companies because no one wants to jump through hoops to use a proprietary tipping service. But if you go with pay pal, you can get tips:
maybey you could have a default .01$ for all sites that are using the micropayment platform (somthing like a discus plugin), and then the option to give more if you really like. so you don't actaully need to think about it most of the time
I still have to decide if I want to pay $0.01 just to visit a page. For every page I want to open I have to go through the mental process of "Is this page worth $0.01?". And it is that cost which is why micropayments like that always fail.