Wiktionary
bait-and-switch
a. Relating to use of bait and switch (offering one attractive exchange initially, but not honoring the offer) in business, politics, and elsewhere.
Wikipedia
Bait-and-switch
Bait-and-switch is a form of fraud used in retail sales, but also employed in other contexts.
Usage examples of "bait-and-switch".
He'd only had to make citizens' arrests of seventeen pickpockets, five grifters, eight con artists, and a bait-and-switch vendor to do it, the latter peddling fake copies of an inertial mapping system that kept track of a person's movements away from a known point of origin, like a time-touring gate.