Official statement from Valve.
We shared with the NYAG that these types of boxes in our games are widely used, not just in video games but in the tangible world as well, where generations have grown up opening baseball card packs and blind boxes and bags, and then trading and selling the items they receive.
You’re right! We should stop that too!
I’m not a psychologist or any sort of expert who can properly evaluate something as “gambling” or “not gambling”, but I’ve seen kids going through pack after pack of Magic cards at the shop and I’ve seen people going through scratch-off after scratch-off at the corner store, and to my eye, it’s the same picture.
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