In December of last year I purchased a 10 million email ad campaign (with a 10,000 clicks guarantee) from extremeleadprogram.com for $269.00.
I was promoting MLM Recruit On Demand which is a lead generation program. (It's free to join and the upgrade only costs $15.00)
I had high expectations, but unfortunately I did not make any sales from this ad campaign. Not even a single sign-up. It doesn't get any worse than that.
By contrast, I promoted the same program via Herculist for $20 and even although I only received a little over 1,000 clicks, I got several sign-ups and even made a couple of sales.
Even when I use free safelists I often get sign-ups, so to not receive any from a supposedly 10 million email ad is really strange.
Needless to say, this was a total waste of money.