What kind of campaigns should you avoid to publish?

What kind of campaigns should you avoid to publish?

There is one kind of advertising campaign that you should avoid at all costs. That is CPS (cost per sale) based campaign. The reason you should avoid this advertising campaign is that it's really hard, not to say impossible to make a person buy a product or service immediately after he sees an Advertisement on some site about that product. Even if the person makes a purchase from the advertising site or buy's the exact advertised product or service he will do this purchase at a later time or date.
Here are some reasons why most people and when i say most I mean 95% of the people will not make a purchase by following your published ad:
1. They don't have their credit card with them at that moment.
2. They are too lazy to purchase at that time
3. They have no intension on purchasing anything at the moment because they are looking or searching for other content on the web.
4. Their credit card is out of money at the moment
5. Their credit card is blocked at the moment
6. They are surfing the web from their job place
7. They are surfing the web from an online cafe or computer that is not theirs
8. They are uncertain if the product or service is legitimate
9. They are afraid from getting their credit card information staled

These are just some of the reasons why you should avoid CPS campaigns. Although these campaigns will pay you minimum of 10$ and pay up to 350$ for a single sale, or if we speak high end they can pay up to 1000$ for a sale, for example a car dealership can be selling a car or a car company can be selling a car and so on.... The thing is if they are not backed-up by some other form of payment, for example Cost per thousand impressions you should not publish this kind of campaigns.