"Mr. Costolo pointed to Glennz Tees, an online T-shirt retailer that was part of this winter’s pilot group, as a small business that has already had success using the self-serve platform. After a character on “The Big Bang Theory” appeared on the show wearing a Glennz shirt, the owners took to their Twitter account and bought up terms related to the show. Mr. Costolo claims they doubled their holiday sales over the previous year and tripled their Twitter followers."