While 91% of advisors have at least one fee-based account in their book of business, the still remaining overall high percentage of transactional business illustrates that fee-based business has a very long way to go.

FORBES: Fitting Fee-Based Business Into Your Practice

And instead of asking drivers to pay commission, users will incur a small fee every time they book a cab.

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According to The Wall Street Journal, Amazon will soon launch a subscription-based book service, charging a monthly fee for access to a library of e-books.

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Analyst Keith Benjamin figures online mall CUC NetMarket's model -- where customers pay an up-front fee to receive bigger discounts on all subsequent book purchases -- might prove more profitable.

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Not wanting to lose out completely, we contacted a customer who we knew wanted the book, and offered to broker the deal for a small fee.

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The site is free to use but will soon charge a fee for premium services, such as uploading video or a book of shared photos and memories.

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Charing Cross Theatre said it was not reasonable to require them to include the commission fee in ticket prices because the website also gave theatre-goers the option to book in person at the box office, where no commission was payable.

BBC: Box Office sign

Some people book refundable backup tickets or discounted tickets on an airline like Southwest that doesn't charge a change fee, so the fare can be used for a later flight.

WSJ: Summer Air-Travel Survival Guide