Copyright 2018 NPR. To see more, visit AUDIE CORNISH, HOST: Facebook gets most of its revenue from advertising - more than $13 billion between April and June of this year. It sells itself as a simple and effective way to reach a target audience. That targeting has gotten Facebook into hot water with users over privacy concerns. And for businesses, the larger looming question is, is it worth it? NPR's Jasmine Garsd reports. JASMINE GARSD, BYLINE: Some version of this might have happened to you. You hit like on a healthy eating Facebook page, and soon enough you start getting advertisements for fitness groups and weight loss products which you're not interested in. A new class-action lawsuit claims that Facebook isn't delivering on its advertising...
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