Purchased a voucher and a flight so combined have spent over $350, no email confirming my spend yet which is strange. Normally any offer is "logged' straight away and an email sent.
Will update on the progress
I've spent $500 on a QF voucher with WBC Amex a few days ago and I've received no email or credit to date. Spent over $1,000 on a QF flight with NAB Amex at the same time and same thing, no email or credit. Have got another flight to book tomorrow using my Amex Plat Charge so will see how we go. In the past, I've always at least received an email shortly after making an eligible purchase.