From dodgy metrics to fake news, unsafe ad placements to questionable value, Google and Facebook have been in the headlines for all the wrong reasons in recent months, but despite the adverse publicity of late 2016 and early 2017, the internet giants show few signs of relinquishing their share of the world's digital advertising revenues. Data from Zenith indicates the pair bagged almost two thirds of the growth in global adspend over the past four years (2012-16) and an even higher share of the growth in digital spending.
And while an April 2017 survey of global advertisers by...