I’d stick with Amazon if I were you. All of my Amazon sites only have Amazon affiliate links. If you use Google Adsense display ads on your site, you’re literally taking people away from your site for the sake of just a few cents with these type of ads. If you direct them just to Amazon, then you have a greater chance of earning more money from that click.
FriendFinder is an adult-friendly network of dating websites that has a terrific affiliate marketing program, both in terms of customer service and commission rates. Because they rely heavily on affiliates to recruit new members, they treat their affiliates like true business partners. They have a solid reputation for payment and security, and have frequent special offers. Checking into your affiliate account at FriendFinder is always a fun experience, and often a profitable one.
Know when (and when not) to use Viglinks and Skimlinks. If you applied to an affiliate program but were denied, you might be able to still be an affiliate for that advertiser through a secondary affiliate program like VigLink or Skimlinks. Basically, they themselves are affiliates and will split their affiliate commission with you if you put their affiliate link in your content for an advertiser. Obviously, the commission rate is lower for you in this case, so if you ever are accepted into the advertiser’s affiliate program directly, immediately switch from using VigLink / Skimlinks affiliate links to your own.