I really wish articles would stop repeating the blanket claim that Bitcoin payments have lower fees than traditional transactions. While true in many cases, it is definitely not true with regard to micropayments. At the protocol level, Bitcoin is horrible for micropayments. Don't get me wrong, Bitcoin is great for some things like moderately-sized international payments, but is not designed for frequent small payment…
If there's a payment aggregator doing this for a number of micropayment merchants, I can see some future in this. However, Bitcoin protocol is not compatible with polling transactions retrospectively, so that requires either a "credit" account or a small deposit to start with.