If the program you are considering has this requirement, check how many sales need to be made before the level is reached. This is a key area that you should look at. Some affiliate agreements are totally in favour of the supplier. Others are more balanced. Some agreements restrict your ability to promote similar products from other suppliers.
Most agreements have anti-spam provisions.
Look for agreements that are fair and that do not stack everything against you as the affiliate. While there are other factors that can be considered when choosing an affiliate program, following the suggestions above will help you to make superior business choices that will lead to long-term success. For anyone really interested in Affiliate Marketing, Declan Dunn has much to say on the subject and this might be your best dollar spend. If you are looking at either becoming an affiliate as a reseller for an established company, or setting up your own business for affiliates to sell your product or promote your service, Declan's book on the subject is recognised as the 'bible' of Affiliate Marketing. The Affiliate Assistant allows you to organize all of your affiliate program efforts and analyze your affiliate program advertising campaigns.