BitPass, a micropayments operation: Opinions?

When visiting Scott McCloud’s website, I came across an online comic for which he charges 25 cents.

BitPass handles the micropayments. They offer prepaid cards that can be purchased for as little as $3.00. The recipient of your funds (called the “Earner”) is charged about 15%. If there is one year of inactivity, your account will be suspended.

Does any Doper have experience with BitPass? I found one wrinkle: they have a marketing preferences menu that apparently can only be viewed once you’ve signed up.