Why would another game ever honor those tokens outside of cosmetic fluff junk? It's like, as an IHoP, agreeing to honor every coupon Denny's issues - like sure

Why would another game ever honor those tokens outside of cosmetic fluff junk? It's like, as an IHoP, agreeing to honor every coupon Denny's issues - like sure, you can grab a bit of extra business that way, but Denny's could also screw you by flooding the market with coupons where they aren't competing. Also, bear in mind that you still need to cook all those meals (or, rather, do all the art for those cosmetics). And if you're making art you probably want your normal players to be able to give you money for it as well... and you might not want to give it away for free to players just because they supported this other company that's not you.