You may be unpersuaded, but, as Miguel acknowledged in a recent article linked here, most OSS developers have (wisely, IMO) kept their distance and relegated Mono to a sideshow. While MS was constantly making veiled threats about patent issues with free software in general and Linux in particular Sun and Oracle were making important contributions and treating Linux as a first-class deployment platform. Maybe you can't see a difference here but it couldn't be plainer to many of us.