You can buy things at a garage sale, for example, and then clean them up and sell them for a profit on eBay, Craigslist or Facebook. If you don't have the money to buy a few items at a garage sale, start with your own garage or attic. Post some items online and share the link...
There's a reason for this: A lot of these link-posting sites are scams. For these businesses, the money isn't in finding people to post links. It's finding people to pay for a course on how to do it or to pay for the privilege of registering to get access to a list of link-p...