Did Michael say that the teams have unlimited U-Turns?!!! Please no, not this TAR Canada stuff
No, just that since this was a blind U-turn it did not count. That is they can still use one non-blind U-turn. The easiest way to think about it is that they only have one courtesy-of photo so they can only use that once.
I think that the Canadian U-turn boxes had a small box on the front where teams could find courtesy-of photos.
I also think there was an old version where one team had lost their photo so they could not use the U-turn.
Well, teams have not been required to carry their own courtesy-of photos anymore since season 19
In season 19 - 22, they use electronic tablet for u-turn
In season 23 - 28, the photos are provided right at the u-turn
But in season 22, Joey and Maghan did eligible to use the u-turn in leg 10 despite having used a blind one in leg 5