Buying digital advertising is big part of my job. I find the exact opposite to be true. FB provides high quality, low fraud. Especially compared to anything that's not Google/FB.

When we advertise to raise money (for politicians) that provides a direct provable ROI and I can tell you nothing else has come close. Seems that is true for many corporations as well just look at FBs growing revenue. FB provides the tools to measure either a sale or the value of an app install over time the increased spend is proof of quality/value so clearly many others have also found success. I wonder who/what/how your campaigns didn't provide value?