If you are looking for a payback on an investment, better to buy a utility or a manufacturer that pays a dividend. The internet companies are all about Ponzinomics.... but they have been good at Ponzinomics.
Also, I'm not hating on Google. Nor am I seeking cash payouts, like dividends.
However, look at Walmart or Wells Fargo, companies that make cash and have very low development costs. Banking is certainly competitive and risky, but WFC, for example, doesn't need to blow all its cash each month just to stay alive.