I can confirm the Dragons Red V number is the total number of memberships that they have sold, including both tickets and non-ticketed memberships.
As for your question Thommo about is there any clubs that might only submit their ticketed numbers only to the NRL, all I can say is it wouldn't be in their best interest to do something like that. All clubs have to provide some pretty comprehensive breakdowns of their membership numbers, revenues and so on to the NRL, so they'd have to tweak all that as well, which is something I couldn't understand them doing.
That said I could see some clubs potentially 'holding back' member number updates from the traditionally stronger months of October and November to make the quieter months of December and January look stronger, and show regular constant updates, but the numbers that will come out in late March will be pretty much the final numbers.
The reality, is outside of Souths, most clubs haven't yet worked out how to effectively market their non-ticketed memberships. Eels are possibly the next biggest in the non-ticketed arena, but the rest, non-ticketed would often only be less than 10% of their total membership numbers.
Also Panthers do have non-ticketed memberships, if you look they offer an interstate/international membership package and a bush membership package.