  Decentraland is a blockchain-based social virtual world touted to be a
creative space owned by its community. In it, users can publish wearables used
to customize avatars, which can be then sold or given away via blockchain
transfers. Decentral Games (DG), a single project owning prominent in-world
casinos, has by far created the most wearables, necessary to earn
cryptocurrency in its flagship game ICE Poker. Herein, we present a
comprehensive study on how DG and ICE Poker influence the dynamics of wearables
and in-world visits in Decentraland. To this end, we analyzed 5.9 million
wearable transfers made on the Polygon blockchain (and related sales) over a
two-year period, and 677 million log events of in-world user positions in an
overlapping 10-month period. We found that the platform-wise number of
transfers and sales monetary value of wearables were disproportionally related
to DG, and that its two ICE Poker casinos (less than 0.1% of the world map)
represented a very large average share of daily unique visitors (33%) and time
spent in the virtual world (20%). Despite several alternative in-world economic
and artistic initiatives in Decentraland, some of which have attracted much
attention from the general public, a single third-party online poker game
appears to be the main driver of the analyzed dynamics. Our work thus
contributes to the current understanding of user behavior in social virtual
worlds, and it is among the first to study the emerging phenomenon of
blockchain-based online gambling in virtual reality spaces.
