I find that the traffic sucks with the link dumps. However I have noticed some search engine results from the link dumps. It just a matter of how low you want to go to get traffic. Link Dumps are dirty IMO. Comparable to ditch digging. You dig it and then fill it back up with dirt. A thankless time waster
Sigs? I only click on the ones that have more posts than me. But if you make me laugh ok