I want to create a referral. I want FB users to download a file from a file hosting CPA network. (Means they have to complete a survey to download the file) I dont want CPA network to know that traffic is coming from FB, instead it should look like traffic is coming from my Wordpress website. Also I dont want downloaders to see my website and they should directly go to CPA network's file downloading link. So how should i set up that particular link on my Wordpress website ? The link will be visible on my website, so if CPA network checks, it look legit.