Starting your business or expanding your business with linkshare, you have to register an account and then apply seperately to which company products you are interested to advertise.
commisission are also count differently, based on the company itself.
while with Amazon, once you register, you'll gain access immideately to millions of product. advretising becomes much easier as you can develop an amazon astore,classic link, recommended product box, widgets and lots more.
commission are based on the number of product that you sells, for example, 1-4 products 4%, more than 10 products 6% and so on up to 10%.
so..make your move and checkout amazon.com (join associates) and also register as an linkshare affiliate right now.