You should be happy , playing games with siblings are great , I remember the days when my brother and I played PS 2 together when we were younger . sleepygamerluna <| sep |> And the point of this is ? They have more people , better technology and can actually see the market not just the two prices your broker wants to show you , how does this help the little guy ? Edit that ' s fine downvote me , i still see no benefit in it . <| sep |> So common , it is like the same person posting over and over . <| sep |> I am an Android developer at a small ecommerce company . We send tracking data to Facebook . We send product ids of all the products that users see to Facebook so that when the user is browsing Facebook , it will show you ads of the products that you saw . Facebook knows little about your history about the products that you visited on our app and we have an API from which Facebook gets data about the product name , price , image , link etc and shows it to you and charges us . And this is how we try to make our customers buy more from the app . This is a bit like web browser cookies but in reverse .