Originally Posted by
Disco Volante
It is wrong because the terms and conditions were never varied to to make only charge card holders and not credit card holders eligible for the discount.
The current terms and conditions apply to cards which were never eligible for the discount. Cards which were have different different terms and conditions, which continues the discount. If your card is eligible, you will also find reference to it on the back of the BA Amex statement.
I agree with what you've written, I don't see how that makes the reply you objected to wrong: saying that in the past Plat card holders got a waiver, with no comment on other cards.