Raoul wanted a new cellphone.One of the companies was offering free cellphones with a purchase of a two-year contract.Along with the offer came free text messaging for a month.Raoul purchased the contract.After the month he liked the text package so much he kept it at a rather hefty price.This is an example of

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This is an example of the foot-in-the-door technique, where a small initial request (getting the free text package for a month) leads to a larger request (purchasing the same package at a hefty price).

Raoul Wanted a New Cellphone