Changkkj
An interesting offer, and I see where you have posted it on a least one other aviation site.
I’ve also won (partner) passes, so I know first-hand about the challenges one can run into just giving them away. But as a brand new member posting such an offer, people are going to be naturally skeptical.
I would suggest narrowing your focus to JetBlue employees sites, if people are able to verify you are a B6 employee and that the passes are genuine, they will more confident in contacting you.