I don't think they expected such volume of $0.01 transactions.. that's why?
It was never part of the design.
As has been mentioned a handful of times in this thread, this product wasn't really thought out that well, and it's just amazing that it's been active for 2.5 years. One of the simplest ways it could've been made better for BW was by implementing a minimum transaction value of $1 to earn points.
I'm not even talking about this deal specifically. Just on general credit card offers, 1point per dollar wouldn't make sense if points cost the banks 1c or more. This deal probably makes the most sense actually, since it's a flat cost per transaction, and BW would come out on top for any transaction over $10 (assuming points do cost them 1c).
