p84 'illustrates the economics' and shows positive contribution profit. But when you look more closely at the numbers on page 16, you see: - Once you deduct ma

p84 'illustrates the economics' and shows positive contribution profit. But when you look more closely at the numbers on page 16, you see: - Once you deduct marketing costs, contribution profit goes from 11% to 2% - G&A is $77MM, which seems like a lot when you consider fulfillment is only $53MM. I wonder how G&A will increase as revenue increases. Even if 5% of G&A is variable (proportional to revenue), this results in 0% contribution profit. Of course, we can also wonder what the 'other depreciation and amortization' is.