OK, so this Daily Rate thing is rather interesting. As far as I can see, it was incorporated into the T&Cs/PDS dated 21 Oct, so not sure why they have suddenly sent out an email about it now.
All Mastercards use Mastercard's exchange rate, which is usually the same in both directions, but leave it up to the issuing bank to apply any currency conversion fees. The 28degrees card also uses the MC rates and as we know, doesn't add any fees, but other cards do. However, the MC website doesn't show the rate until 1-2 working days afterwards, so you don't know the rate before spending. The eventual rate can be better or worse than the interbank rate on the day when you spent the money.
Now I always thought that QCash charged a 3% fee on top of the Mastercard exchange rate (when you don't lock in the DCC rate offered by Heritage Bank, i.e. if you have AUD loaded and spend euros). But it appears that this fee no longer exists. And with this new website feature, we are now informed of the rate
in advance of making the transaction.
This means that if you notice that the QCash rate beats the interbank rate, you can make some money... if you can be bothered. You'd have to load AUD and spend it on the card, but also have the foreign cash which you can sell back to AUD.
For example, currently the AUD/EUR rate is 0.6262. But the QCash rate is 0.6507. If I were in Germany right now, and had $1500 on my QCash card, I could spend 976 euros at this rate. I could then withdraw 975 euros from my German bank account (worth A$1557) and sell it to a bureau de change I know, who would give me A$1540 right now.
Which means I've made $40 and 1500 Qantas points, but only if I actually wanted to buy the goods that cost 976 euros. I could do the same thing getting cash from an ATM and selling it straight away, but I would be charged the ATM fee and not get any Qantas points. This would be a waste of your time if you are actually on holiday.
However, I do have a similar card which is sort of worth it. It is a UK product called Supercard (
http://supercard.io) which is in a closed 'beta' trial. It doesn't charge any forex fees but most importantly, it treats cash withdrawals as purchases. You electronically link it to a credit card and they charge your card when you use the Supercard. It's a Visa and the Visa Europe exchange rates are usually not as good as Mastercard's. But you get the occasional day where the rate is better than interbank. On those days, I can make an ATM withdrawal in Australia, which gets charged to my linked UK card as a purchase. As I have sold GBP for AUD, I now go to my UK online banking where I convert AUD in my account back to GBP, which will be more or less at the same rate, so I haven't lost any money but earned a lot of points on my UK card... it's not the best use of time, but if I have nothing better to do...