Mediagazer: Tumblr Launches Mobile Ads Today In Big Revenue Push (Cotton Delo/AdAge)

4:15 PM ET, April 22, 2013

Top News:

Ali Velshi / Quartz:

Ex-CNN anchor: Twitter is merciless when media lag, ruthless when they're wrong — For a time, Gabrielle Giffords was dead. So was Newtown, Connecticut, shooter Adam Lanza's father. Or maybe it was his brother in Hoboken, New Jersey. All three, as we now know, are alive. Two of them weren't even shot.

Discussion: Felix Salmon, Quartz and Kirk LaPointe's …

David Carr / New York Times:

In Boston, CNN Stumbles in Rush to Break News — Like a lot of Americans, when I woke up on Friday morning and found out there was a manhunt in the Boston area for the remaining suspect in Monday's bombing at the marathon, I turned on CNN. — It's a common impulse, although less common than it used to be.

Discussion: Poynter, NYT Bits, Deadline.com, BuzzMachine, TVNewser, New York Magazine, Columbia Journalism Review, FishbowlNY, Chickaboomer, Prof Chris Daly's Blog, Storyful Blog, Alexia Tsotsis, Brian Solis, @jayrosen_nyu and Los Angeles Times

Bill Grueskin / Columbia Journalism Review: In defense of scoops — Their reputation took a beating in Boston …

Mackenzie Weinger / Politico:

Matthew Keys on Reuters firing: ‘I assume they were looking for an out’ — Matthew Keys said his firing from Reuters “wasn't unexpected” — and while the company told him they “did not agree with” some of the coverage he did on his own about the Boston bombings and did not mention the indictment against him …

Discussion: FishbowlNY, Politico, @thematthewkeys, @thematthewkeys, The Huffington Post and @edgecliffe

Philip Bump / The Atlantic Wire:

Reuters Fired Its Indicted Social Media Editor After Bad Social Media Editing — Thomson Reuters could handle its deputy social media editor, Matthew Keys, being indicted on federal hacking charges. But after a week in which he was harshly criticized for inaccurate tweets to his 35,000-plus followers …

Cotton Delo / AdAge:

Tumblr Launches Mobile Ads Today In Big Revenue Push — Users of iOS and Android Apps Will See Up to 4 Ads Per Day — Tumblr is launching its mobile ads today, marking the first time the 6-year-old startup is placing ads that look and feel like regular posts on the blog network.

Discussion: Tumblr Staff, VentureBeat, Betabeat, CNET, paidContent, The Verge, Valleywag, App Advice, TUAW, Mashable, WebProNews, Complex and IntoMobile

Bloomberg:

Time Warner-CBS Seen Candidate for Merger: Real M&A — Time Warner Inc. (TWX) and CBS Corp. (CBS) have flirted for years. A marriage now may make more sense than ever. — CBS shares, while trading near the highest price since the company and Viacom Inc. split seven years ago …

Sam Biddle / Valleywag:

Sorry to Disrupt: Valleywag Is Back — You're doing it again. It's only been a few years since we last met here, but you, Valley venture capitalist and Alley opportunist, are worse than ever. There will come a day when all the coddling and cheerleading you've become accustomed to curdles …

Discussion: Gawker, @samfbiddle and @davemcclure

Jim Romenesko:

Chicago Tribune sends pizza to Boston Globe newsroom — According to a Globe tweet, the Tribune told Globe journalists that “we can't buy you lost sleep, but we can pick up your lunch.” The Globe's response: “Classy to the core.” — * Check out the pizzas in the Globe newsroom (vine.co) |

Discussion: FishbowlNY, @meghanncir, @jeffjohnroberts and @elgray

David Bauder / Associated Press:

Boston Manhunt Viewers: More Than 40 Million Tune In During Last Hour — NEW YORK (AP) — Nearly 42 million people watched the last hour of Friday's manhunt for the Boston Marathon bombing suspect on television. — That was the Nielsen company's estimate Monday of the number of people watching ABC …

Andrew Beaujon / Poynter:

Pranksters insert ‘apology’ letter into copies of New York Post — The art and culture site Animal inserted a letter purporting to be from New York Post Editor Col Allan into some copies of the paper Friday. A video outlines the prank: — “This week, the New York Post has acted recklessly …

Peter Kafka / AllThingsD:

Twitter Gets a Vote of Confidence — And a Big Check — From Madison Avenue — More momentum for Twitter's growing ad business — a commitment from a big ad buyer to funnel “hundreds of millions” of its clients' money to the social network. — As the Financial Times reports …

Discussion: Financial Times, Financial Times and CNET

Chloe Albanesius / PC Magazine:

Reddit on Marathon Bomber Crowd Sourcing: We Were Wrong — Reddit on Monday addressed the controversy surrounding the Internet sleuths who crowd sourced the search for the Boston Marathon bombers, admitting that the effort got out of hand. — “Though started with noble intentions …

Discussion: reddit, VentureBeat, Mediaite, Boston Herald and TrustedReviews