TRON has been establishing itself as an arcade gaming platform.
Reward tokens NFT's can then be used to buy in game items.
In TronGoo players earn Goo, that earns TRX.
Hopefully in time earnings in Dungeons will be able to earn TRX also.
They have announced in game prizes of TRON already.
https://sludgefeed.com/cryptodungeons-becomes-latest-game-to-join-tron/