Honestly, because I was a computer programmer before I can theoretically see how this tracking is done. And it is not very complicated.
What I don't like is the definite cheap trick feel to it. Here's an example:
Imagine you are talking to a friend about aquariums. Then you go about your business.
At some point a guy walks up to you and says "Hey, I overheard your conversation. I have very good prices for aquariums!"
How would you feel?
-->Trust me - it will all depend on his presentation - face, clothes, manners, speech.
But what if the guy walked through the window of your house?
--> No presentation will matter.
Or the computer screen?
--> No banner makes me feel warm and fuzzy inside. It's trash. Normally banners make me feel like they lead you to someone that is geared up to steal your credit card information. I'm weird, am I not, I know everyone else loves them!
That's my point with this off-topic thread.
By the way MacFan gave me a book about marketing. It has a lot to do with this thread. It's called "UNmarketing" by Scott Stratten. He starts with making fun of direct mail, ad campaigns that slam us over and over and so on. All things advertisement we are so used to inhale every day. He believes they are completely worthless and marketing is all about relationships. Find the book and decide for yourself: http://www.unmarketing.com http://www.amazon.com/UnMarketing-St.../dp/047061787X
(Funny thing when I came home my wife told me she has that book, has attended the seminar, and even told me about it all. "The new is well forgotten old" they say. "You are so dumb" in other words. Right now, here on my table I have 2 of these books laughing at my stupidity in my face.)