It just hit me that the Merchants *would actually love Newter (if they realized what his power did instead of just figuring that it knocks people out)*
Yeah, that’s probably true. His power – but not his personality – would fit right into their group, had he not been taken by Faultline.
Also, it’s not like he makes his power a secret. He was perfectly willing to fill Taylor in on it (Taylor and some other characters we know are a lot more reluctant to inform others about the full extent of their power even while temporarily working with them), and, more notably, he openly sells his spit already at Palanquin. There’s no way the specifics of his power wouldn’t be easy to find out, and the Parahumans wiki probably has it all listed.
(Now, whether the Merchants would bother to is a whole other question.)