Hi Alex!
Won't do anything for you IMO.
First, you have no control over the IBLs and their quality and relevance. In fact, I'm willing to bet, those that are participating in these scemes are newbies or spammers with little to contribute in the way of quality.
It goes against the algo grain. You don't want to build to many IBLs to quickly because it is unnatural and will most likeley hurt you more than help. Google can measure the speed and amount of Inbounds you are getting...
And something like this, depending how it is set up, can be just a disguise for someone who is going to spam the pants off of you.
Bottom line it will most likely produce little traffic and is most likely a waste of time.
There is nothing more powerful than hand selected or a natural collection of inbounds.
Just my thoughts,
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