Twitter advertising: Magpie, etc
I've only seen bad reviews for these services so far, but admittedly I've only been able to find reviews from the Twitterers themselves who use those services to try to make money while they tweet. The usual reviews are that they have lots of Twitter followers, but almost never have anyone click on the Magpie ads or the ads don't even show at all. I haven't found reviews by the other side of the coin, advertisers who pay to have their ads shown on Twitter, which is what I'm considering doing to get more traffic to my CPA-based site.
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