A raffle might increase game play .
award one raffle ticket for first win one for 5th win one for every 5th after that day
have weekly monthly and quartly draws .

maybe  three to five prizes on the weekly of maybe  premium sailors  PCL or the like
for the monthly three to five prizes of better quilty  to intrest the old vetren players
maybe a hero sailor pack,expert and vet packs , three monthes premium ?
then three spectacular prizes on the quartly draws.

just might get play up and for very little in give aways