If I remember correctly from reading those who tried, the problem with 'viable micropayments' is compliance. If you cut on it and make transactions cheap, your

If I remember correctly from reading those who tried, the problem with 'viable micropayments' is compliance. If you cut on it and make transactions cheap, your service will be heavily abused for fraud and laundering. Preventing that makes transactions cost nearly as much as traditional card payments, thus not viable.