This is a question that has been asked in our shop many times, Revo is £600 and our custom dyno tuned TFSi software is £349, but we do get customers that want revo and won't have anything else.
We then get the customers that think £349 is a 'rip off' due to the chavtastic parts shop down the road offering Remaps for £150 if you pay cash. And they like the fact it takes them only 30 mins whereas we spend 3 hours on the car, so there is a market for fast and cheap work.
Then the same bargain basement customers that actually complain to US because they can get what they believe to be the same thing cheaper elsewhere! It's not as if we are forcing them to buy anything.
However I do feel that now the cars value has dropped significantly, Revo may choose to rethink the price, but if they are still selling lots of TFSI maps then why would they?