This might be a targeted offer -
$5 off on orders $20 or more via the MyMacca's app - enjoy,
This is probably targeted so please check if you were one of the targeted recipients
Offer only available on MyMacca's app and only via mobile ordering
at least it's not another $1 hashbrown, but the current weekly offer is 20% off orders >= $10 for those who don't intend to spend $20