In fact, this is commonly done. There's an entire trade around having people scan their iris and you (the buyer of their biometric) keep the resultant token. I

In fact, this is commonly done. There's an entire trade around having people scan their iris and you (the buyer of their biometric) keep the resultant token. I think what I read was around the more rural areas in Africa. I'm not referring to the "official" practice by World Coin themselves where people are recruited to scan (in Africa metro areas) and the participant actually get the tokens. There's also this underground trade in iris scans.