Do you have forms on the binged site? I find TGPs and link lists get both lots of mass auto attempts to fill in the submit form (not very hardcore attempts - they are thwarted by the most basic of catchpas) and bings at about the same time. Failing that, look at your
full target URLs. ClitPass gets binged a lot, it also gets a lot of attempts to break into some old accounts system that PC had for surfers (so I get hits like
http://clitpass.com?ID=1234&PASS=aardvark). I am guessing the binging is part of some auto break in software, and the mass of either auto log ins or auto form fillings is part of the same thing.