National Geographic announced on Dec. 18 that it was suspending its posts to Instagram until presented with updated terms of service. @NatGeo is one of Instagram's most popular accounts with 638,629 followers. "We are very concerned about the direction of the proposed new terms of service," NatGeo's post reads. "If they remain as presented, we may close our account." Read more.

Commercial breaks in your News Feed? Facebook plans to debut video advertisements that autoplay in the News Feed and is courting TV advertisers, according to AdAge. The ads will be released in the first half of 2013. Read more.

Discovery Communications has invested in social learning company Grockit to the tune of about $20 million. The strategic investment from Discovery will also include shared technology, as well as marketing, distribution and promotional opportunities via Learnist, Grockit’s social learning platform. Read more.

Kodak sold its digital imaging patents for $525 million to Apple and Microsoft-backed Intellectual Ventures and RPX Corporation — a consortium that also includes Google, LG and HTC. Read more.

Real estate information marketplace Zillow has new features aimed at property management. The new additions, available today, allow managers and rental agents to create a free, custom website for their brand or business, which will be fully integrated with Zillow Rental listings. Read more.