i. You will use Product Advertising Content only in a lawful manner in accordance with and within the express scope of the terms of this License. You will not use PA API, Data Feeds, or Product Advertising Content with any site or application, or in any other manner, that does not have the principal purpose of advertising and marketing an Amazon Site and driving sales of products and services on an Amazon Site.
Banner and sidebar ads: Virtually every affiliate program provides a wide variety of ads that you can insert into the sidebars, header and footer sections of your WordPress website. Some of these affiliate ads promote a flat-fee product like the Amazon Prime free trial. Others automatically update with features products and items from your affiliate partner. Either way, if your reader clicks on one and makes a purchase, you get paid.
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".
Product prices and availability may vary from time to time. Because prices for and availability of Products that you have listed on your Site may change, your Site may only show prices and availability if: (a) we serve the link in which that price and availability data are displayed, or (b) you obtain Product pricing and availability data via PA API and you comply with the requirements regarding use of PA API in the License.