I have seen a practice at the local amusement park, where visitors can pay additional money to "jump the line" for rides and go to the front instead of waiting. What do you think of this practice? ...

I have seen a practice at the local amusement park, where visitors can pay additional money to "jump the line" for rides and go to the front instead of waiting.  
What do you think of this practice?  What impact does it have on the customers?  How does it affect the business?  If you were trying to use a waiting line model, how would it be affected?

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