Wait, why would you guess that? There's a rational reason for a higher number of sales in the Valley - there's a concentration of acquirors - but profitability

Wait, why would you guess that? There's a rational reason for a higher number of sales in the Valley - there's a concentration of acquirors - but profitability generally has very little to do with proximity to paying users/advertisers, except for very large numbers (i.e. TV and cable networks).