He added, "I had no idea it would be on every computer in the world and used for probably every conceivable design idea. This is a big surprise to me as well."
CBS News correspondent Elaine Quijano asked Costello why he thinks Papyrus became one of the most hated fonts by graphic designers.
"I really think -- and again if I can take this time to apologize to my brother and sister graphic designers," he said, "I'm a graphic designer as well, I'm an illustrator ... I believe it's a well-designed font, it's well-thought out."
Costello sold the font for $750 and said he receives "very low" royalty payments. At the time, he said selling the rights made him feel like a rock star signing a record deal.