As I said before, we urgently need to hire an advertising team to create an ads campaigns to generate some hype and ultimately recruit new players that we need most.
I suggest setting up a series of promo cards for new players only and the gold cards from this series should be airdrop from old accounts only. In addition, each new account referred by old one would entitle you to an additional chance for the airdrop. Set that up with a good advertising campaign and this should attract the attention of new players.