However , Dorsey said Square is an `` entirely new canvas , '' dealing as it does with commerce rather than communication . Twitter co-founder Jack Dorsey is now ceo of a mobile payments company . Square enables the virtual exchange of cash and goods . Comment: His comments come as social network Twitter , valued at $ 11 billion , prepares to go public .
Twitter co-founder Jack Dorsey is now ceo of a mobile payments company . Square enables the virtual exchange of cash and goods . Comment: His comments come as social network Twitter , valued at $ 11 billion , prepares to go public .