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I have problems with back pain (I sit all day typing, not too surprising)

Facebook ad for stretching program for back pain shows up a few times. I eventually decide to buy it.

It works, resolves my back pain.

I had a real problem, a solution was advertised to me, I bought it, and it worked.

No induced demand.



For each ad for a legitimate back pain remedy, how many hoax ones do you think there are? 9? 99? 999?




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