It works essentially the same way as the phone apps do above. If you don’t care to let Google know what you do on a daily basis, you can make money from home by letting them monitor your Internet usage. They use the information they gather to help them market/increase the functionality of their advertising programs when targeting users that are similar to you.
But don't make the mistake of thinking this will be a passive source of income—you're on call whenever you have a guest and you'll always need to keep the place clean for incoming visitors. On top of just renting on Airbnb, consider offering your guests paid add-ons, like Lauren Gheysens', Royal Day Out in London, England—where she gives visitors a local's only tour of the city, complete with bespoke 18th century costumes.
Some advertisers offer multi-tier programs that distribute commission into a hierarchical referral network of sign-ups and sub-partners. In practical terms, publisher "A" signs up to the program with an advertiser and gets rewarded for the agreed activity conducted by a referred visitor. If publisher "A" attracts publishers "B" and "C" to sign up for the same program using his sign-up code, all future activities performed by publishers "B" and "C" will result in additional commission (at a lower rate) for publisher "A".
You may have a strong opinion about politics or that you have something to say about AIDS prevention in South Africa. You may believe there is a serious conspiracy going on with the NSA surveillance program, or there is a serious lack of compassion in our society nowadays. You would like to talk about the great sex you had last night, or you just want to let go of your frustration after a tough day in the office.
LinkShare — Like Commission Junction, LinkShare provides access to affiliate-marketing opportunities from a variety of companies, including Buy.com. LinkShare’s site features an easy-to-read publisher dashboard that keeps you apprised of the latest offers from your merchant partners and gives you real-time access to your earning data. According to the site, commission rates typically reach up to 20 percent.
Said to be the largest affiliate marketing network in North America (though it operates globally) and claiming the number-two spot in the 2012 Blue Book of Top 20 Affiliate Networks for being “the best at balancing the relationship between the merchants, the network, and the affiliates,” California-based Commission Junction, owned by ValueClick, Inc., offers affiliate, media, and tracking services and provides either a self-management or company-managed option for your affiliate relationships.