Right-click on any link in a forum post, 'copy' link, and paste it into any editor. You'll get a nice, long, spammy thing, kind of like this...
Every link that gets posted into a forum post gets wrapped in this 'viglink.com' stuff, identifying what you were reading, and of course yielding up your IP address and any previously saved cookies along with the HTTP request. It hits their site first, and then redirects to the referenced page, enabling even more spying, on the off chance it's a product link that PCWorld could get paid for, but always recording and watching what you do, regardless.
Accumulate and resell those statistics.
Or potentially report to online reputation management when people post certain kinds of links, because you need to get those shills in, earning their money, too. An invaluable service.
I'm sorry, but you are not even remotely close. viglink has nothing to do with tracking anything. Stop making stuff up and posting it as fact. As a reminder, intentionally posting false or disparaging information is a violation of the PCWorld Community Standards and will result in being banned.