Any examples?
Though referral/affiliate models are uncommon they challenge the statement about "Two kinds of companies".
Though, there's services like pricegeek that crawl Ebay graphing the better deals. They piggyback of Ebay's existing affiliate model. They never solicit anything from the customer, nor does backlinking alter the price of the item. I guess the utility is of an 'aggregator', that makes decently priced items for more accessible.
My main point was that 'Your Product is Going to Fail if you Don’t Ask Users to Pay' seemed a little overtly broad.