Good for connecting professionals for business
Now it's good at supplying a pool of recipients for spammers and an audience for irrelevant advertising. I would have considered paying a fee for the service a few years back, but now? I don't think so. A discussion entitled "Found a cool contest for a $500 shopping spree for gold and silver!" is just not something that I'm willing to pay for, and I'm close to not putting up with it "for free."