Coincidentally I noticed that both Simple and Square do not mention anything (anymore) about who they are. No about page, no team page, no nothing. Especially with companies that are all about your money, I'd at least like to know who's running the shop.

Since it's pretty much the standard for startups to tell about themselves on their web site, this must have been a deliberate choice. What advantage does it have – especially in the case of Square and Simple – not to show who you are?