Yes it is sharing with them on the same discussion the link of the site, yes it is a fake ad that redirects to a fake chipmixer link.
in addition at the bottom of the page we can see that the email address is not the same.
https://ibb.co/wdLth03Here is Chipmixer official Onion address: chipmixerwzxtzbw.onion and the Email:
chipmixer@protonmail.comScammers like them always try to use the reputation of established platform like Chipmixer and its another obvious attempt. Just keep distance from this type of fake websites and bookmark the real website link.