Why Most of Your Assumptions About Phone Calls are Wrong
Both Sides of the Table
JANUARY 14, 2014
The three largest webmail services had over 1 billion global users at the end of 2011. It’s why I wrote this article about Invoca (formerly RingRevenue) that the most obvious mobile Internet ad unit is, in fact, a phone call. And while this data is from mid-2011 I can assure you that data is not going down.
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