If recent past history is a guide they usually announce the double SC offer around the Friday of the last full working week before Christmas ....this year that would be around Friday Dec 19 if they hold to that form ...... but nothing is certain with Velocity is it.
I think they bank on the low take up rate at that time of the year with a lot of people packed up and shut down for year / plus other calls being made on peoples funds at that time of the year.
That said last years offer was a cracker with a very wide date spread ...... I recall booking 5 or 6 non critical date trips for the first half of the year on the morning of new years eve. With a bit of regular travel and a transpac flight or two in J or PE and your sitting at Plat and can be heading to a gifted gold before you know it.
Here is last years full extract , -
For a limited time only, Velocity members can earn Double Status Credits when flying on eligible Virgin Australia flights between 1 February - 30 June 2014. To take advantage of this offer, members must book by 31 December 2013. This offer is valid for new bookings made between 18 December - 31 December 2013 inclusive, for travel on eligible Virgin Australia flights between 1 February - 30 June 2014 inclusive. Eligible flights include any flights operated by Virgin Australia or Virgin Samoa with a Virgin Australia or Virgin Samoa (VA) flight number, and flown in a fare class and itinerary that normally earns Status Credits