Social networking sites have to pay their hosting bills somehow. It's entirely legit to sell ads. Yet that doesn't excuse taking ad revenue from scammers.
I've recently been more annoyed than usual by a "free electricity" scam being pushed at me via ads. The ads no longer tout "magnetic generators", but that is probably to stay under the radar. The link for this scam goes through doubleclick.net (a site I have blocked in my hosts file because I find them scummy), and that's as far as I'm going to follow it.
I've reported the scam to the administration. We'll see where it goes.
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