You would verify your own identity in a decentralized manner using your own Keybase ID.

Verified moderators would be trusted more than Unverified moderators by Marketplace users as if an Verified moderator was to abuse their moderation powers they could be held accountable by the wronged party, Unverified moderators are able to be anonymous.

Verified moderators would therefore have more chance of being picked to moderate stores and earn payment for their services.