http://www.lasocietestellaartois.com/

From what I've surmised on the site, you get a welcoming kit that includes a set of chalices from Stella Artois and is essentially an exclusive club. One of the rewards:

Here's a few codes to get you all started:

5758TKY

6667LNO

1478KNS

6225QOR

4796FWT

9970NNF