Most of the sales come from follow up messages. Try to build a list by setting an opt-in page as your landing page to collect opt-in first and your sales page as a thank you page. Most people decide to buy after 4-5 exposures and most sales come from follow up sequences.
Make sure to find a seller that has an audience that fits your offer. Landing a sale depends on your offer, how attractive it is to the potential customer.
Exactly what Jan says. Many sellers don't accept an offer if it goes straight to a sales page. We want you to get traffic that convert to leads that after some exposure convert to buyers. There is a saying that "the money is in the list" and it's very true here.
It's like when yo buy something in a store, you probably where exposed to that product multiple times thorugh tv-ads, magazines etc and unconciously where pulled to that product