To be honest, even using it to convince somebody of something isn't a big scam if there is no victim. Maybe they just need it for credibility so somebody will take them seriously with some project they can perform. Kind of like people lying on a resume. Sure it's dishonest, but as long as they can fulfill the job it is victim-less.

Somebody may want to know why they're using it before selling them an address, that's fine. But to flame this guy for wanting to have an old address to look like an early adopter when there's no proof of scamming seems immature.

It's all just speculation so stop flaming the guy.