I'm not saying it wouldn't benefit anyone. Just that the friction of paying for anything at all, assuming a reasonable level of security, is such that if I'm willing to pay $.01 I'm probably willing to pay $1. If I'm willing to pay $1 I'm more than 20% likely to be willing to pay $5. So the optimal pricing strategy would never be a micropayment.

This is why there's nothing funded by micropayments. (Unless you count free-to-play gaming where, for some reason, people refer to a $14 average purchase as a micropayment.)

If it were possible to lower the friction while maintaining security, that presumably would already be the case, as there is a HUGE financial incentive on the part of sellers.