Now many games are using NFT for their development. To attract a lot of users NFT games are using airdrops like this
https://twitter.com/spacegrime/status/1396545308809601025. If you will check the results of airdrop you can see that airdrops are very effective and can attract a lot of users to the gaming comminity.
After CryptoKitties, there are so many games with NFT that you need an exciting story, interesting graphics and powerful advertising to attract attention.
The opportunity to earn money by playing games attracts many players from the gaming industry to cryptocurrencies, thereby increasing the liquidity of NFT games.