Lewis, the Telegraph's award-winning editor-in-chief, departed after a disagreement over the future direction of the publisher's digital operations which he was put in charge of last year.
Listen, in Britain, to Steve Auckland, back in charge of the Metro titles and calming down his predecessor's enthusiasm for digital operations, which had perhaps "gone over the edge".
Viner has created a lively, challenging and thought-provoking digital operation which has proved popular with readers and advertisers alike.
However, GNM's digital operation, which expanded to the US in late 2011 and Australia earlier this year, has grown monthly browsers by almost 40% year on year to around 83 million.
It is understood that Metro.co.uk's digital operation – which after significant investment has seen a 300%-plus surge in browsers over the last year to more than 22 million a month – will be subsumed within Mail Online.
The senior executive of a new startup bank is attempting to demonstrate the difference between the incumbent high street banks (the boring Y-fronts) and the "speed not comfort" approach of Atom, a new digital operation which is planning to open its virtual doors later this year.
It will also combine the promising telecoms and digital media operations, which currently offer the best profit margins for the company, into a consumer products division.
She pioneered agile marketing within Capital One and helped redesign the interaction model across Product, Marketing, Brand, Digital, and Operations, which led to breakout growth and innovation.
Like many digital operations, Reddit, which is based in San Francisco, keeps its staff mean and lean.
Gibson launched Guardian US in September 2011, and has since created a truly agenda-setting digital news operation which, amongst many triumphs, is most notable for its handling of the extraordinary, multi award-winning Edward Snowden revelations.
Special Counsel Bob Mueller, the Senate Intelligence Committee, and its counterpart in the House are all looking into whether Trump's digital campaign operation, which spent heavily on Facebook in the closing weeks of the campaign, had any connection to Russian cyber ops conducted on Facebook.
