It's not impossible but it is rather difficult, as you need to do some marketing, at least in the beginning, in order to develop a following. Generally, this involves social media engagement, e. g. garnering followers on Twitter and fans on Facebook, and presenting links, etc. to them. Too much presentation of links can be offputting to most people, and I'm afraid there's no magic formula for when it tips over from being not enough to too much. Furthermore, most people need to see something about 7 or so times before they will make a purchase, so that can mean a carpeting type of campaign. They are hard to do right, without sliding into spam territory.