Why can't they sell products and be like an Apple, Oracle, Microsoft. I am guessing it's too much work to grow in such a massive pace without ads. Ads are a marketers/sales persons dream and these marketers are very likely to spend money.
This ad economy is so very sad and it's killed many nice things. Everyone is just giving out things for free and nobody wants to pay for anything thanks to this whole ad economy. News reporting has gone to the dogs because nobody wants to pay. Email will no see decent progress thanks to gmail.
Anyway, I feel Google will be a much better company if it can get rid of dependence on ads but I guess it's too late now since it has to answer to shareholders and show never ending growth.