Thanks everybody for your reply's.
The traffic situation in the Maldives is a bit unpredictable to say at least. At times we have spend 30 minutes standing on the runway wiating for a space on the apron. However most of the times they keep us in the hold with similar times going around the hold. This happens only on certain days and certain times during the week. Normally when aal the charter flights from Europe come in.
Personally I would not commit to the Maldives and use my alternate fuel in the hold. Years ago a Twin Otter (seaplane) crashed into the seawall surrounding the airport and scattered debris all over the runway. Runway closed for a considerable time. So it's not only the traffic that actually uses the runway that you have to take into account in the decision.
So if I understand correctly QR uses statistical fuel? Is there any fat in this system when flying to Male? As all we know the guy might have been kept low by Mumbai, hence burning more fuel.