A survey commissioned by Vizu of more than 500 US digital marketing and media professionals finds that 64% will be increasing their paid social media advertising budgets this year, primarily by modest amounts. While that’s a positive sign of growth for paid social ads, which command only 1-10% of online budgets for most of the respondents, some issues remain. Namely, presented with a choice of 4 attitudes towards the ads, less than one-third of the advertisers and agencies polled chose the response indicating that the ads are effective and produce measurable ROI. (ROI is defined in the report as metric achieved per dollar spent.) Read the rest at MarketingCharts.