He purchased 40% of women's athletic shoe company Ryka in 1995. Rubin started Global Sports in 1998 and the company later turned into GSI Commerce.
He sold the company to eBay for $2.4 billion. Rubin later bought back the consumer businesses of GSI. He turned Fanatics, Rue La La, and Shop Runner into the company Kynetic.
He has been featured on the CBS show Undercover Boss. Rubin bought a minority share of the NBA's Philadelphia 76ers in 2011
He lives with his girlfriend Nicole Lapin and has one daughter.