There's no end to Marissa Mayer's revolutionary measures at Yahoo. First came the free food, then the free iPhones. Now, she's on a mission to pull all of the "®'s" from Yahoo's logo.
The trademark, (almost) literally, of a grown up company is the "registered" symbol that was attached to all of the logos to make sure everyone knew Yahoo was a real enterprise; this was back in the nineties, during the web's early days and the dotcom boom, but it is now being removed.
It's like Mayer is competing with Barack Obama for the "socialist of the year" title. Or maybe because a registered symbol, in this day and age, for a company as well-known as Yahoo is really tacky and quite off-putting to the hip, anti-establishment (not really) programmers that populate Silicon Valley these days.
"One of our new Yahoo!s Andrew was really bugged by the registered trademark symbol at the end of our logo; he's gone on a mission removing all the R's from our site and our campus. This is one on the random R's we pulled off a wall," Mayer wrote
on an Instagram photo of said "R" sign, which you can see above.