Telcos in ad tech, haven't we seen this movie before?
Briefly

T-Mobile's acquisition of Vistart is part of a long history where telecoms, armed with customer data, venture into the ad industry, only to face hurdles that crush ambitions.
AT&T's experience with AppNexus illustrates the perilous journey of telcos wanting to compete in ad tech. Despite significant investments, they couldn't navigate the intense competition and complex regulations.
Read at Digiday
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