Alex – presumably because there are three direct EK flights to Dubai including one at 21.00 which is a better bet than the connection above. Also for Sydney and most of the others (except Lagos) you can go one stop via Dubai or AD.
Not sure why people would bother with an extra stop, tedious change of terminal at LHR and a short haul flight in cramped conditions in order to fly Virgin particularly as the Gulf airlines are usually cheaper as well.
The whole Little Red idea is fundamentally flawed and the capacity wasted should be used for something worthwhile. As mentioned on the other review flying 21 people is taking up a slot that could be used by 400 odd on a 380.