bait-and-switch
noun[CorU]
ukusMARKETING
amethodofsellingin which aproductisadvertisedat a verylowpricetoattractcustomers, who are thenpersuadedtobuya differentproductat ahigherprice:
Itseemsto him that manybrokershave been doing a bait-and-switch,luringcustomerswithlowratesandfees, thenincreasingthosecostsnear theclosingdate.
bait-and-switchtactics