It would seem to be a small thing for WGT to do.
This even applies to the state flags within the US, or other federal jurisdictions such as the German Laender.
In the case of the US, and perhaps elsewhere, it is specifically relevant to WGT's business because the state you live in affects your eligibility to play in certain types of competitions (rules on skill-based gaming).
Why don't they swap out the uninhabited Bouvet Island for the inhabited Wales?