Well, of course there’s going to one number that is different, or else the pretense of it being a contest would be lost. But it is cheaper just to give everyone else the same number.
The ones I’ve seen lately have been glued to ads for auto dealers. Probably it just fell off.
Yes, I have also received a CodeKase in the mail. It’s just as you described: black oval with a code inside. But instead of having a 7-digit code inside, mine only has six. This puzzles me.
Not in the least bit surprising.