I can't find a link on the interwebs, but was shown an email by the check out person today.
Apparently, there's been a recent change (or recent to me), that as long as it's an EFTPOS marked card, ALDI won't be charging the 0.5% surcharge, regardless of whether the card was inserted or tapped. This also applies to virtual cards via Google pay, Apple pay, etc.
Least cost routing