The most likely reason is that the outline of the device is more distinct and identifiable in the marketing with them on. Without them it is just a black rectangle with a logo.
Definitely a clever way to get a lot of publicity for a seemingly fairly major anticheat oversight. I believe that the intent wasn’t malicious, they could have done a lot more harm if they wanted to.
Virtual Boy Pro for Nintendo Switch - Announcement Trailer (2024) (youtu.be) angielski
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