We can call it "Pay for secrets" or "Tavern Access" in local shop.
You pay a certain amount to see more info about people like what used to be done in middle age taverns...
Tier 1: guild name
Tier 2: most killed mob (or something)
Tier 2: highest xp
Tier 3: latest sale
Or it could be a one time payment.. just guild name..
E.g. My name could be Powderling [Guildname] [x] in chat... can be turned on and off...
More suggestions for higher tiers lol..
This could open up way to awards or like medals...