Those sites serve Flash content to non-Linux desktops over Linux ones by a huge margin, like 99% to 1%. And merely serving Flash doesn't mean you are an Adobe

Those sites serve Flash content to non-Linux desktops over Linux ones by a huge margin, like 99% to 1%. And merely serving Flash doesn't mean you are an Adobe customer. The guy that writes the Flash content in Adobe Flash (in a Mac or a Windows PC) is their customer.