There is an interesting debate headlining the "Marketing Week" site today. Was its columnist, Mark Ritson, right to say it was too late for Big Five holding companies?

Amazon and eBay have been accused by MPs of not getting to grips with a problem of vendors using the sites that are not charging value-added tax (VAT). Sky News reports a report from the Public Accounts Committee claims this is anti-competitive and that HMRC should be doing far more to clamp down on the online marketplaces.

Twitter's CEO Jack Dorsey has promised users, through a series of recent tweets, that the site will take a far tougher stance on right-wing and hate-inciting trolls, "The Mirror" reports.

The IAB UK has announced a Gold Standard in digital advertising that 23 of its board members are already signed up to achieve. The standard requires companies to take three steps to help tackle fraud, drop intrusive ad formats and become certified for brand safety, "Campaign" reports.

"Campaign" reveals that Hyundai is on the hunt for creative agencies to add to its UK roster. The move follows disappointing sales, particularly at its sub-brand Kia.

Elizabeth Fagan, senior vice president at Walgreens Boots Alliance (owner of Boots) has been appointed as the next president of ISBA, "Campaign" reveals. She will take up the post next month.

Netflix has just had a record third quarter for subscriber numbers. However, "The Telegraph" reports that the streaming service is expecting that growth to slow as it raises premium subscription rates into the UK and US.

Budweiser is claiming that its relaunch of its low-alcohol Bud Light brand this year has been a major success because it is appealing to young people who have "fallen out of love" with beer. "Marketing Week" reveals the beer maker is about to follow up February's relaunch with a new campaign and is already claiming a repeat purchase rate of 27%.

A British production company that was due to make a drama series about North Korea has had its computers hacked to the point where it has dropped the project, BBC reports.

Last week, the social media giants were told by the UK government they must educate schoolchildren about the dangers of going online. Now, Facebook has announced it will train up ambassadors in 4,500 schools across the country to advise fellow pupils how to go online safely and how to deal with issues such as cyberbullying, "The Drum" reports.