I own a few gambling sites and am wondering if social bookmarking is worth pursuing as a link building/SERP improving method. The articles are never going to be "dugg" enough to get onto their homepage so is there any point. Also, with the majority of social sites being no follow these days links won't benefit me will they?
You are absolutely correct. What have you done so far to build links otherwise? You could hop onto a few gambling forums and contribute there with your signature.
I wouldn't give up on social bookmarking altogether. Earlier on a few followed social links can help get the traffic trickling in.