It also leaves you room to offer higher commissions in the form of bonuses or contests. (ie: For the month of December, we're offering a $100 bonus to all affiliates who reach $1000 in commissions.) That way you're not stuck offering a high commission all the time – but it's something you can offer as a bonus to really get your affiliate's attention and ramp up sales during certain times of the year.
Affiliate marketing overlaps with other Internet marketing methods to some degree, because affiliates often use regular advertising methods. Those methods include organic search engine optimization (SEO), paid search engine marketing (PPC – Pay Per Click), e-mail marketing, content marketing, and (in some sense) display advertising. On the other hand, affiliates sometimes use less orthodox techniques, such as publishing reviews of products or services offered by a partner.