-If the product is COD, after they click the ad they land on my page, where they fill a module with 3 fields to "order" the product, then the affiliate network call center will call them to confirm the order.
-If the product is pre-paid, after they click the ad they land on my page where I funnel them to the end where I add the iframe of the affiliate network where the client can complete the purchase.
They never leave my website.
I only get paid for every lead I send, usually with 25% tolerance (so if you send 100 leads but only 80 complete the purchase, you're still inside your tolerance so you get paid for all 100)
I don't have to setup a shop and I can change product whenever I want. At this moment I'm promoting 10 different gadgets from different networks, it would be extremely hard to scale THIS MUCH with my own ecommerce.
Here's a very basic one: https://idee-per-te.it/camino/index.html
I'll send the network via PM, for the videos it's all explained in the guide.
I would suggest to sign up in all the networks, then look at the offers and find one you can confidently promote.