That's not what's happening here. These extras are being paid the same to act in the background of a shot, just like always, but the studio expects them to give up the rights to their likeness forever after so they can try to replace them.
The studio expects the extras to participate in the destruction of this job with nothing in return.
Very hyped. Got the Leviathon box mostly because I just enjoying hobbying and the value was so good. But with these new gauntas and lictors, very excited to build out more tyranids