[Licker4U]

I've long been a proponent of "submit to link lists that send traffic" but after intense research (about 30 min) I've found that 99% of my sales since Oct. 2006 have come from two recip groupings. There are only a very few sales that came from one or two other recip groups. Is there any reason to keep submitting to the other lists? I feel like the law of diminishing returns is biting me on the butt.