Honestly the fare has been around since 2013, but for the most part gone under the radar, because it was too difficult to book in relation to other options. I mentioned it several times both in this forum and via PM. http://www.flyertalk.com/forum/22683581-post353.html

The sudden increase in exMPM bookings is due to a few reasons

1) The large increase in South Africa fares
2) The relaxation of the local currency requirements
3) The sudden devaluation of the MZN making the prices even lower

People have been trying to book exMPM fares for a while, but QR wasn't the easiest to work with.

The currency has lost about 50% in the past year: http://www.xe.com/currencycharts/?fr...to=MZN&view=1Y