How much is your traffic worth ?

I am wondering what is your traffic worth? So, e.g. atm I have 100 unique visitors per day at all my casino sites and make about 2000€/month with it.

So each unique customer is worth about 0,64€.

I calculated this a while ago, as I tried adwords, paying about 0,90€/click for my keywords (it was possible for my keywords, also with the casino banners on the site !!). I made about 60% of my money back, but couldn’t make it profitable.

So what is one unique visitor worth from google natural search for you ??

Matt