Hey all. The first thing that I'm gonna say is sorry for my english. Let me tell you why you should NOT use PPD(files locked with surveys). First the obvious things: 1. They are middleman All of them get the offers from CPA networks that allow incentive traffic. They get some % from the price of the offer. Let's say the offer from the network is $1.20. The owner of the PPD site will get ~$0.20 and you'll get $1.00. That's how they're making their money. But I guess that's nothing new for you. Lot of people says that you can save time and headache with PPD because you don't have to apply for CPA networks, talking on the phone, etc. This is MISTAKE! One phone call can make you +$0.20 for every single conversion! After you make 1000 conversion, you'll be thankful to yourself that you've made that phone call which made you +$200. 2. Their offers sucks Why? Because almost all of them are PIN submits nowadays. You can optimize them and remove the paid ones but even if you do this the file rarely will unlock on simple first page submit(as it says when you check the description/conversion point of the offer). Sometimes this is advertisers trick, sometimes the owner of the PPD site configuring it to work like this(the user need to complete 2-3 offers to unlock the file). This way they make even more money with YOUR traffic! Now let's talk about things that are not so obvious to most of you. 3. They shave How you know? you'll ask. Well, if the thing with the multiple completion isn't enough for you, keep reading. I've uploaded peace of software that can track the installations. So if someone opens the file, I know what's the IP of the user, their OS and etc. I want to say that I'm not promoting any malicious software. It's simple tool used just to compare the installs with paid downloads. Guess what, I got 11 installs and only 7 of them was paid to me by the PPD site that I won't mention(don't ask for it). You can say that someone downloaded the file then sent the .exe to a friend. Yeah, that's possible scenario. What you believe it's all up to you. And before you say I'm mad at some PPD site or something. Well, I'm not. I've switched to CPA and now I'm on my way to start working directly with the adertisers because let's not forget that CPA networks are middlemans too So my advice is: Cut the middleman! Stop wasting your traffic for pennies!