Probably because they don't use their proprietary stuff to lock people into their products. Making something proprietary isn't, on it's own, illegal, it's a bu

Probably because they don't use their proprietary stuff to lock people into their products. Making something proprietary isn't, on it's own, illegal, it's a business decision. Using your proprietary technology to crush competition is, well, anti-competitive behavior and is illegal. For instance, Apple owning the lions share of the digital music player market with their proprietary iPod isn't illegal. However, making it so all iPods can only play Apple's proprietary song format and offering only that format in the iTunes store, effectively rendering any other digital music player on the market useless, would be illegal.