What is r-e-f-e-r-e-r.com all about?

lbartley Monthly
El Presidente
Just Getting Started
126
#690

I've noticed a bunch of visits to several of my WP sites lately from http://r-e-f-e-r-e-r.com. Information on Google is somewhat sketchy but it seems to be some sort of "referral spam". Anyone know what this is all about? should I be concerned? Is it something beneficial or should I be trying to block it?

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