Commission Junction — This site serves as a clearinghouse for thousands of companies and small businesses looking to get into the affiliate business. It offers myriad affiliate programs, but you must apply separately to each one. Payout rates vary wildly, up to 50 percent, and some commissions are based on leads or clicks vs. sales. Frustratingly, Commission Junction deducts $10 from your accrued earnings for every month in which you don’t actively earn commissions; if you let your account lapse, your income could get wiped out.
The phrase, "Affiliates are an extended sales force for your business", which is often used to explain affiliate marketing, is not completely accurate. The primary difference between the two is that affiliate marketers provide little if any influence on a possible prospect in the conversion process once that prospect is directed to the advertiser's website. The sales team of the advertiser, however, does have the control and influence up to the point where the prospect either a) signs the contract, or b) completes the purchase.
Cost per mille requires only that the publisher make the advertising available on his or her website and display it to the page visitors in order to receive a commission. Pay per click requires one additional step in the conversion process to generate revenue for the publisher: A visitor must not only be made aware of the advertisement but must also click on the advertisement to visit the advertiser's website.
Affiliate marketing is commonly confused with referral marketing, as both forms of marketing use third parties to drive sales to the retailer. The two forms of marketing are differentiated, however, in how they drive sales, where affiliate marketing relies purely on financial motivations, while referral marketing relies more on trust and personal relationships.