Right now there are about 8 million merchants in the US that accept credit cards. That doesn’t include people who do transactions over craigslist or dog walkers or people fund-raising for the PTA. There is such untapped demand. Like, we had a couch in the office that was really ugly, and we sold it for $5,000, and we accepted a credit card. There are moments in life when that’s necessary. And that’s what we’re focused on.
Twitter Cofounder Takes On the Credit Card Biz | Magazine