"I want to look cool" is a very strong motivation. A particularly rare and sought-after CS:GO skin could be worth as much as $2000. Valve actively support the exchange of virtual items for real money via the Community Market, and provide market access to third-party sites via an API.
That combination of factors has created a hive of scum and villainy. CS:GO skins became the ideal unit of value for unregulated gambling sites - they're highly liquid, they have a stable value, they're freely exchangeable for real money and there's no KYC or age verification checks.
The mechanics and appearance of Mystery Brand are almost identical to numerous existing CS:GO gambling sites; they even use the same colour-coding for the rarity of items. Some CS:GO gambling sites already offer real-world prizes like electronics and designer clothing.
https://en.wikipedia.org/wiki/Skin_gambling
https://hellcase.com/en/open/knifelife
https://www.csgolive.com/case/Millionaire%20Case%20%28vIRL%2...