Why AT&T bought AppNexus and the deal's likely outcomes

AT&T’s purchase of AppNexus has been perceived as a landmark development for the adtech sector and one that is likely to have far-reaching implications in terms of catalyzing more M&A activity in the space. 
For now though, the jury is out on whether or not it will have the desired impact of significantly impacting Facebook and Google’s dominance of the digital advertising market.
AT&T confirmed its purchase of AppNexus, in a deal estimated to be worth anywhere up to