The social medium has agreed not to allow non-sponsors to buy promoted Twitter ads based on Games-related tags like #London2012. Locog is concerned that digital platforms like Twitter might be used to piggy-back the event. Last year, Marketing reported Locog struck an arrangement with Foursquare to allow only official sponsors to check-in around the Olympic Park zone.

Historypin, a platform that lets people “record the story of human history”, is inviting the public to submit pictures, audio and video for “Pinning The Queen’s History”, which will bring together 60 years of the British monarch’s rule. Since 1952, The Queen has made 261 official overseas visits, covering 116 different countries. Media will be ‘pinned’ onto a Google Map on the site and overlaid onto Street View so viewers can compare past scenes with how they look today.

The backbench Conservative MP has set up a company, Menschbozier, with Luke Cholerton-Bozier, whom she encountered on a social-networking website. "As we're like-minded on the subject, we decided to register a company together as partners and see what we could come up with. We're talking about several social-media ideas, probably combined with politics. I have reached my friend limit on Facebook, so it seemed like a natural choice to try and do something more in the area."

The streaming music service's restriction on certain functionality for free users appears to have passed muster with German royalty collection agency Gema, which is known to be difficult to deal with. Earlier this year, Spotify rival Grooveshark shut down operations in Germany, citing "unreasonably high" licensing costs imposed by Gema. Cologne-based rival Simfy already has more two million users in Germany (and Austria, Belgium and Switzerland). Rdio and Deezer are available in the country, too.

The two countries were added today, World Day Against Cyber-Censorship, by Reporters Without Borders because their citizens access to the Internet is repressed. India and Kazakhstan have been added to the category of "countries under surveillance" on the updated list. The Paris-based group said last year would be remembered as one of unprecedented violence against netizens. Also on the list: Burma, China, Cuba, Iran, North Korea, Saudi Arabia, Syria, Turkmenistan, Uzbekistan and Vietnam.

On Feb. 29, some people found a bit of spam in their email and one after another from around the globe hit "Reply All", demanding to be removed from the list. Unbeknownst to them, they had been signed up to a listserv so that each demand was being sent to all the people in the original email. Then, something strange happened. Camaraderie broke out.

Moving to "honour and standardise the attribution of discovery" on the web, Brainpickings.org's Maria Popova proposes curators attribute their sources one of two ways, using the "Curator's Code". A "via" indicates direct discovery, and would be used for reposting a bit of content with little or no change. A "hat tip" would signify an indirect link of discovery, wherein content is just a jumping-of point for new material. Details are at curatorscode.org.

Youku Inc. is set to buy Tudou Holdings Ltd., in a stock-for-stock transaction that will make them dominant, with more than a third of the online video advertising market. Under the terms of the agreement, Youku shareholders and ADS holders will own approximately 71.5% of a newly combined entity, Youku Tudou Inc., and Tudou shareholders and ADS holders will own 28.5%. Together, the companies would control more than a third of China's online video advertising market.

After trialling content recommendation engine Outbrain on London24.com, the regional publisher reports an uplift in page views per visitor. The tools helps users find relevant content more easily and highlights sponsored recommendations on other sites, which the publisher gets paid for if clicked on.

Three years after it launched at the South by Southwest conference in Texas, which ends today, the location-based social network is gone. The moble phone app, which reported 600,000 users a year ago, also launched the same day as Foursquare, which has enjoyed a much higher level of popularity. Facebook hired Gowalla's founders and some staff to help build up its own location offering.