PTR sites....Another way to get Large amounts of Traffic

As we all try day after day to get traffic to our sites we're faced with having to take money out of our pocket to pay for it or we spend alot of time surfing for minimal credits. Just to get our sites seen and possibly make a sale.
PTR sites have thousands of members that are getting paid to see the ad. Thus increasing the way to get a sale. I've joined one to start out and earned enough to buy advertising emails to the members as a research project. Since Sept 1st. I applied the earned cash for advertising to my site. To date I have had an additional 753 people visit my site. 46 booked mark my site and I made two sales. There are 6,000 plus members in that PTR site. Since then I joined five others and been earning by reading there emails. You have to watch out and read the home page carefully. Some of them don't offer a redemption option for advertising. Below are the few I joined and want to share them with anyone that wants to try this. They are as followed: Pretty Mail, Coastal Mail, As One Wishes, 3-Dollar Mail,
FX-Mails,
These sites have thousands of members and offer redemptions for your time and upgrades for faster payouts. Yes you can earn real money with these sites too!