The word ‘shill’ comes to mind.
: to act as a shill
to act as a spokesperson or promoter
…the eminent Shakespearean producer … is now shilling for a brokerage house —Andy Rooney
Soon after the school shooting in Parkland, Florida, Merriam-Webster’s online dictionary changed its definition of “assault rifle.”
The entry for “assault rifle,” which was updated March 31, 2018, reads as follows:
any of various intermediate-range, magazine-fed military rifles (such as the AK-47) that can be set for automatic or semiautomatic fire; also : a rifle that resembles a military assault rifle but is designed to allow only semiautomatic fire