Large companies do not generally innovate. Their internal inertia prevents them from successfully creating new things. Also the larger a company gets, the more layers of brainless MBA parasites latch on to suck them dry.
Large companies rely on purchasing innovation by buying up a never ending stream of smaller companies. They then take the ideas/products and launch them to a wider market.
Steam has remained small by rejecting massive buyout offers. This has allowed them to remain innovative.
Freereadfeed.com
Then use the library for the rest of the series if needed. :-).