The month of August marked a watershed moment for the Fiksu Indexes, as the Cost Per Loyal User (CPLU) index surpassed $4 for the first time. That’s a 36 percent rise since July and a 117 percent increase since last year. August’s results reflect increased activity across the world of mobile marketing, indicating that advertisers are allocating more money toward mobile and trading higher costs for greater audience precision. The takeaway? Advertisers need to continue spending smart in order to target the right mobile audiences in this increasingly competitive app marketing ecosystem. On the app download front, the Fiksu App…..