There most certainly IS a product! The only way I can imagine that you came to believe there wasn't is that you were confused by the fact that they give their product away.
Does Encyclopedia Britannica's website "britannica.com" have a product? Is Encarta a product? Of course they are, and so is Wikipedia, unless BY DEFINITION you exclude any "product" not exchanged for money from the definition of "product". And by that definition, the second can of beans I got at the grocery store on a buy-one-get-one-free sale wasn't a product -- which I feel demolishes the usefulness of the term.
It's something that's produced, but not something sold (like Encarta). Accordingly you're right that it is a product.
In the informal sense in which we talk about users "being the product" I'd call it not quite right, since there's nothing sold. The user doesn't have to worry as much about ulterior motives.
