Why Davido, Olamide, and Tiwa Savage Endorsed Phones They Dont Use

Davido, Wizkid, Olamide, Tiwa Savage has been a brand ambassador to huge brand phones. They got paid heavily for these deals.
but at the end of the day, do they actually use these smart phones?
why?

[@obasifidelia1350]

They are marketing their products for them ,They must not use it ,