noun
piggybacking marketing; bandwagon sales method
A marketing strategy that exploits a current trend, boom, or event (including disasters) to promote and sell products or services. Often carries a negative connotation of opportunism.
震災後に便乗商法でマスクを高値で売る業者が現れた。
After the earthquake, vendors appeared who used piggybacking marketing to sell masks at high prices.
その健康食品の広告は、ダイエットブームに便乗した便乗商法だ。
That health food advertisement is piggybacking marketing that jumped on the diet boom.
Compound of 便乗 (taking advantage of an opportunity, riding along) and 商法 (business method, marketing).