A spokesperson for Otsuka denied that the advertising is at odds with the science.
Others pointed out that when Groupon cut back on its advertising spending, its growth rate also slowed down.
Coupons basically serve two purposes: advertising, and price discrimination.
early 15c., "to take notice of," from Middle French advertiss-, present participle stem of a(d)vertir "to warn" (12c.), from Latin advertere "turn toward," from ad- "toward" (see ad-) + vertere "to turn" (see versus).
Sense shifted to "to give notice to others, warn" (late 15c.) by influence of advertisement; specific meaning "to call attention to goods for sale, rewards, etc." had emerged by late 18c. Original meaning remains in the verb advert "to give attention to." Related: Advertised; advertising.