While I realize and respect that this entirely a personal thing, maybe think about this one a bit. The “Zero Rule” is not so much a published “rule” as an internal guideline to make the game regularly winnable. It is not immediately obvious to the average viewer. Someone who watches the show even, say, 2 or 3 days a week might only end up seeing one or two playings of 10C in a year’s time, depending on the game rotation, or they might not see it at all. Even if they do, the chances of them noticing that all prices specifically end in 0 would be remote. Given that the average person who gets on stage is not a game show statistician, one can hardly fault them for believing the price can be any combination of the given numbers, especially as such is implied if not explicitly stated in the on-air rules explanations. They aren’t being “stupid” or doing something unintuitive, they just don’t have a piece of privileged information.
In fact, this “rule” remains one of the few real advantages that LFsAT still have should they be chosen as a contestants because of its relative obscurity. Further, it makes the game more exciting to watch for those in the know as it builds suspense as each DIGIT is written, rather than just each price.
I guess if I had a pet peeve about 10 Chances, it's not that they "don't know the 'zero rule'." Hardly that.
It's that, when they make a line of incorrect guesses, they get rattled and end up repeating a previous answer.
This is why I think they haven't enforced the so-called "10-second rule" very much if at all. In all the times I've seen the game, I've seen many times where a contestant gets shaken up when they get several incorrect guesses on the three-digit prize (it's always been the three-digit prize) and they have, consequently, fewer chances to win the car.
That's when it's a good idea for Drew -- something both he and Bob have done -- to take the contestant aside, tell them to relax and take a deep breath, review their previous guesses and then really think about what other prices could fit the three-digit prize. Better to take their time and at least try to play the game well rather than rush the game with some "10-second rule."
(And yes, I get why they might have had a "10-second" rule ... to prevent unneeded stalling and to keep the show on pace.)
Brian