Oh God, making me go the "post the definition from the dictionary" route are you? OK, lets do it:

shill
SHil/
North American informal
noun
noun: shill; plural noun: shills

    1.
    an accomplice of a hawker, gambler, or swindler who acts as an enthusiastic customer to entice or encourage others.
        a person who pretends to give an impartial endorsement of something in which they themselves have an interest.

So where is the word "employ" or any synonym used here?