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Re:Reddit's Ad Changes Reduce Your ROI by hammock on Tuesday September 12, 2017 @08:56PM (#15234570)
Parent comment said this correctly, but to clarify: the change doesn't actually increase overall inventory, it only increases "targeted inventory," i.e. you can now follow a jerky subscriber around to other subs, but the total possible impressions across all users is still the same it was.

Seems like Reddit could offer an additional option that limits display to a particular sub only. That way their bigger advertisers could still "spend more" to follow a jerky subscriber around but bold_panda could buy only /r/jerky inventory

Re:Reddit's Ad Changes Reduce Your ROI by bold_panda on Tuesday September 12, 2017 @09:05PM (#15234618)
Yes, I love this idea. Thank you for putting it more succinctly than I could have.
Re:Reddit's Ad Changes Reduce Your ROI by huhtenberg on Wednesday September 13, 2017 @04:22AM (#15236460)
It's a bad idea.

What will end up happening is that bigger advertisers will spam the hell out of everyone, so people will start ignoring/blocking all ads, including more benign sub-specific ones.

A much better option would be to give users an option of suppressing cross-sub ads. This will still show sub's ads when a user is on the sub, which is something that people may actually want.

Strict relevancy of the ads is the key here. This is what reddit ads have had going for them before this change and it was their biggest and unique strength.