This is a simple method which I use to make £50 a day (roughly $70). I have a domain which is used as a fake property rental site. I advertise properties available for rent in local newspapers and Uk free ad sites. When the punter replies to the email he/she receive an autoresponse telling them that the flat is available but a credit check is required. I tell them that we can do the check for them at a cost of £70 or they can do it themselves for free at my free credit check site. They always go to the credit check site and do it there. Result is £5 ($7) for me, the punter is then told that the flat has been given to somebody else.