I tried them but sadly I was making more with google adsense. I recommend Zango thoe, If you are making around $35 a day or so with google adsense then you'll probably make over a hundred with zango. If you think you want to try zango let me know and ill send you my ref link, honestly zango payout is great.
i personally do not like linkishare. Their tracking is far from real time and you need to earn a minimum PER MERCHANT to get paid not for the network.
You get out of it what you put into it. If you have a junk site, then none of their affiliate partnerships will produce income. It isn't so much what Linkshare will do for you, but whether or not you are a good match for their advertisers. Same as with Commission Junction. People write a lot of hate mail about CJ but the real problem is with the publisher methods & websites. Pick & choose advertisers that really fit the niche of your website, then try to avoid making your site look like the Las Vegas Strip with flashing banners & crap filling the page. You can't base your decision on other comments because you have no idea how those people managed their accounts & websites. If you want to know, sign up and use them.
I use them and have had no troubles...they don't have much, but I like getting the occassional check every now and then...
did try them and they seem to get better commissions for some merchants, but i was getting bigger payouts via other networks so prefered to use the same merchants which were on those. so in short, yeah they are an o.k network if you need those merchants