They way I look at it they are more like FIFA World Cup balls each year slightly different and for the last 50 years made by Adidas. Except there it's much clea

They way I look at it they are more like FIFA World Cup balls each year slightly different and for the last 50 years made by Adidas. Except there it's much clearer that they have little meaning outside the specific tournament games and value in sales outside it is clearly seen as collection item not as tool for performing the sport. There is no impression that those are only balls which could be used for proper football competition. From what I understood by reading "Standards of Chess Equipment, venue for FIDE Tournaments" Even official FIDE registered games could happen with other chess sets as long as they are approved by Chief Organiser and the Chief Arbiter of the tournament and comply with much weaker and vaguely defined requirements listed in that document. Although I wouldn't be surprised if many organizers due to prestige and to avoid any unnecessary complaints from players would still try to buy the official sets.