I think the problem might be that users of ad blockers have traditionally been a little more passive - possibly 99% never provide input about an ad, and 1% cont

I think the problem might be that users of ad blockers have traditionally been a little more passive - possibly 99% never provide input about an ad, and 1% contribute. Facebook ads are targeted, so not all users will see the same image at the same time, so the largest crowd sourcing benefits would be gone - as opposed to a div id.