As a disclaimer, I do not endorse the following items and techniques I'm about to explain, but let you know what you shouldn't do even if the offer is tempting. These techniques are against the terms of service for most websites. Lots of affiliates out there are using these techniques to cheat the system so it's only fair that we warn you of them.
1. If you do any marketing whatsoever with CPA, then there is more black hat techniques than white hat techniques. One of them is to incentivize filling in search and e-mail offers. Essentially you make a website where people have to fill in their e-mails in order to access it. There is certain software you can purchase so it allows your website to do this. Sometimes this is perfectly legal using a program such as CPALead which allows this kind of behavior, but most of the time it's frowned upon and will result in an instant ban from your affiliate company.
2. Another technique is to trick the person into filling out an offer. For example, let's say that you have an offer that will pay you five dollars if somebody submits their e-mail address. The offer itself may not be interesting, but you can alter the website so that the e-mail submit address box is still there, but all around it is another offer which is way more exciting such as "be entered to win tickets for the Super Bowl". The real offer however would be "fill in your e-mail address for free color copies" or something boring like that. The point is you turn people into doing it because one offer is 10 times more attractive than the other one. This is really against the terms of service because one company is paying the bill for your success without getting any real leads from it.
3. The final dishonest way to do affiliate marketing is probably the most dishonest and riskiest of them all. The thing is you filling your own offers with different information. Not only are you wasting a company's money, but this is considered fraud and can get you jail time. Just remember that when you sign up with these companies you give them accurate information so it's not too hard for them to send a police officer your way.
Let me reiterate, I do not endorse any of these methods and ask that you refrain from them. This article is simply informational and by no means should you do any of these tactics. It's best that you know that these exist though so you don't get convinced by someone else to do them for quick money.