Not only for deep funding pockets, but also for existing relationships. Say you had an idea that would dramatically improve online retail - you can either develop a white-box solution and try to shop it around (and have them clone it out from under you), or you can build your own online retail empire (good luck), or you can join one.
It's part of what got me to stick around AMZN as long as I did. Myself and some colleagues were very much of the internal-entrepreneurial mindset. We developed lots of prototypes, some of which received rave recognition throughout the company. I left after I realized my management chain (can't speak for others) had little to no real interest in turning them into products. They were more than happy to give lip service, trophies, and have me put together presentations on how innovative and scrappy we were, though.
(I've never worked at Amazon, but I'd also heard that AWS was a small skunkworks project that basically got cover from Amazon's CTO, Werner Vogels, who protected and nurtured it until it was too big to kill.)
A lot of this is due to the lack of a VC infrastructure I think. no sand hill road there.
That's amazing to me. I thought such things were never done in software anymore because: why not leave the company and do the same thing in your own startup? Same hard work, high risk, etc, but with giant upside. Was it because of something wrong with Seattle's startup culture?