In the last decade, LinkedIn has built a robust database of 433 million registered users. Included in this number are hundreds of thousands of marketing experts. Until recently, LinkedIn’s biggest strength remained firmly in its capacity to connect professionals online. At last, it's leapt into the freelancer-for-hire marketplace. The new service, named ProFinder, has a broad focus and is able to narrow down the request to specific niche skills. Here we'll take a look at a few pros and cons of this new LinkedIn offering.