It's hard to tell with these Internet startups if they're really interested in building companies or if they're just interested in the money. I can tell you though: If they don't really want to build a company they won't luck into it. That's because it's so hard that if you don't have a passion you'll give up.
We live in a funny time. If you don't go corporate you can't compete. You're relegated as irrelevant. People used to admire that.