Which of the CPA affiliate programs has the largest list of online stores and is there an unloading of goods?

Question

Partnership programs

Actually question 2:
1) In which of the CPA affiliate programs is the largest list of online stores and there is an unloading of goods?
2) What is the option to upload goods for each store with the ability to make one store based on several uploads with a price comparison (if the goods are the same)
Refs can be thrown if there is a direct non-ref link nearby

Answer 1

aliexpress

Answer 2

In Where is the Elephant? and Admitad are the most complete uploads by advertisers from the eCommerce segment and there are the most of them.