Sites like Share-A-Sale and Amplifinity provide referral fees. Vendors set the referral fees they're willing to pay and for what services. When the transaction happens, you get paid by the company for introducing a new customer to them. uRefer also allows merchants to set up referral programs for introductions and meetings, in addition to any transactions made.
Upwork and 99Designs are great ways to sell higher-ticket services. If you're a seasoned web developer, designer or have skills in other arenas such as the law or accounting or elsewhere, try your hand here to make a bit of money quickly. You will need some sort of track record. But, if you have existing clients, ask them to retain you here so that you can build up your online credibility quicker.
Over the past seven years, I’ve helped sell over 50 different types of products online by providing marketing services. I’ve marketed and sold so many things for people online, including master’s degrees for universities, headphones, travel experiences, hats, sports memorabilia, prefabricated homes, insurance, legal services, real estate services, dental services, and even supplements. In all of these cases, I was getting paid by someone else to sell their products online – none of these were my websites or my products.