I have seen more and more sponsors releasing the Instant Messanger themed popins recently. Currently I am only using flings but I am looking to do some tests with other sponsors to compare conversion rates. Has anyone done this already? If so, who is converting best for you? I am also looking for additional sponsors offering them so whether or not you know how it converts, feel free to list the sponsor along with your referral code if they offer a similar popin.
In case you have no idea what I am referring to, here is an example (it pops in from the bottom corner of the surfers browser):

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Conversion Sharks - 1,000+ adult dating offers, traffic management, and consistently high payouts.
We will guarantee and beat your current EPC to win your dating traffic!
Skype: ConversionSharks ||
Email: info /@/ conversionsharks.com