Amazon’s marketing services bring in a growing stream of direct, high-margin revenue, but their main role is still in supporting vendor partnerships

Amazon uses customer profile data to profit from its own media and that of others, illustrating the value of a direct customer relationship in online advertising

In the future, Amazon’s moves into video content and voice interfaces are likely to significantly expand ad inventory, but maintaining the trust of shoppers is not straightforward

BT had a solid enough quarter, with revenue and EBITDA growth dipping due to pre-warned temporary factors, consumer continuing to outgrow business, and very solid operating trends evident, especially in high speed broadband and mobile

This has of course been entirely overshadowed by the profit warning, with prospective weaknesses in UK public sector and international corporate of far more concern than the contained, albeit surprising, accounting irregularities in Italy

BT has a large share of revenue and a much smaller share of profit from corporate/government data network/IT services, which are erratic in nature and arguably in long term decline in their current form, and without major changes they will continue to be so