Charge for an ad-free version of Facebook. GigaOm reports.

Which social media network commands the majority of most people’s time? Facebook, of course. Duh.

But: Did you realize that Tumblr commands more time from users in the U.S. than Twitter, LinkedIn and Pinterest combined. Me neither. I bet most people working in social media wouldn’t realize that, either.

Marketing Charts has the numbers. Thanks to Barbara for the heads up on this one.

You probably were a little puzzled by the news, too — that Google is opening retail stores. (I think they ought to open kiosks in Home Depot and Lowe’s store; that’s where I need the most help searching for things.) What does Google expect to get out of it? TechCrunch explains.

Forbes lists six of them, but I think they left out an important one: learn html.

By learning at least the basics of html, you’ll start to understand how easy — or how difficult — it is to accomplish things on a web page. This will give you a leg up on other marketers for a few reasons: You’ll be able to make more educated requests of your tech partners, you’ll have a greater appreciation for the work your tech team accomplishes, and you may even come up with some new ideas for your website or landing page that you otherwise may not have.

Years ago, there was an outgoing art director of Entertainment Weekly magazine who was being feted in that issue’s editorial. It was noted that “the best artists think editorially, and the best editors think artistically.”

Similarly: The best online tech people think with some marketing context, while the best online marketers think with some tech knowledge.

Takeaway for marketers: Don’t be afraid to roll up your sleeves and dig in. Knowledge is power. Learn some html; you won’t be sorry.

Really White House? Did you actually think that saying “the photo may not be manipulated in any way” in conjunction with releasing a photo of President Obama shooting skeet was gonna stop the internets? Know Your Meme has more.