The problem is, the whole system is run by two different firms, and a charity is not permitted to give away money without a meeting to get all involved in running the charity to agree, so they can't allow another firm to give away their money. There is a notice on the charge points, but it seems Pod Point has a general policy for all the charge points it manages, so can't change it for just one charge point.
I have been fined for parking with an ICE car, where I returned to a car park before the non return time. I had simply not read the information board, and had not considered Aldi and McDonald's were considered as the same car park when using their drive through.
I have not shopped in Aldi for years as a result, as you say nothing to do with being an EV or ICE same rules apply for both. It is something I must raise, as normally where I volunteer we do not charge or restrict parking, only with special events is there any parking restriction or charge, and we use a trust system, so if some one does not pay, we do not pursue it. The one person who during the last special even used the EV charging point, was a fellow volunteer, so he was not charged for parking, however we were not given any guidance about what to do with anyone wanting to use the EV charging.