staying stealth could benefit in that you are able to build your own product without as much of an outside influence, but for some products, advice from experts helps and could lead you to better opportunities too.
their success is probably more because business owners are willing to provide a massive discount to get the Groupon exposure, $120 million funding and an enormous subscription base.
Maybe inefficiencies may play a part in getting a lack of sleep, but I think being under-resourced plays an even greater role, and that's not something you can always help. I mean, for all those people who have built a business from scratch and working all nighters to meet deadlines- it's probably not within their means to be paying people that easily, and hiring people is not always an easy task