Not necessarily, as GPL3 didn't close the so-called "ASP loophole". Since Goldman Sachs probably wasn't distributing any HFT applications, but just selling acc

Not necessarily, as GPL3 didn't close the so-called "ASP loophole". Since Goldman Sachs probably wasn't distributing any HFT applications, but just selling access to it or using it completely internally, they aren't required to make their modifications public. See http://stackoverflow.com/questions/2127246/difference-between-affero-gpl-and-gplv3 http://stackoverflow.com/questions/2127246/difference-betwee... about the AGPL license which addresses the 'application service provider' issue.