Okay we will see what bring the future.
Also when 15 million DEC a month = 180 million DEC a year sounds much it is not much compared with the Rebellion-Presale:
In the Rebellion-Presale got 441,819 Packs sold (without bonuspacks = only the paied packs) this is at least (if everybody used the 5 Voucher) 1.767.276.000 DEC

So as I pointed out the amount of DEC for buying packs in the presale is nearly enough for 10 year of leaderboard-prices and this is the result of 30 days.

What I should also say is that in reality the leaderboard-prices are cutted down. I mean when I win a leaderboard-price in DEC I can at least reduce the price to 4.000 DEC with help of vouchers and maybe I can do a bulk buy and receive bonus packs. At Hive-Engine a Rebellion-Pack cost at the moment less than 3$, so less than 3000 DEC at peg.

We will all see but maybe the Conflict harm more than all leaderboard-prices together as now player will always compare the price in the official splinterlands-shop with Hive-Engine, so as long as the Price at Hive-Engine won't really increase I guess that Splinterlands won't see much packs.
Before with the airdrop you always could say: "Ok i pay more in the splinterlands-shop but I have a chance of airdrop-cards whom I don't have when I buy at hive-engine" - this is now over.

To be honest I also don't understand this conflict from another site: We listen always from Splinterlands that they have at the moment no capacity to improve things in the game but they have the time to develop this conflict instead of just use the airdrop-system further.