Yup, LEO is now a native token on Arbitrum, while Hive-Engine, Polygon and BSC have their wrapped versions (he-LEO, p-LEO and b-LEO, respectively).
Rewards for posting and leo-voter come from a mechanism called SIRP, which uses various methods (curation rewards, premium, creator subscriptions, ads, etc) to generate a revenue which is then used to buy the LEO that fund the reward and delegation pools.
I have no idea whetever this is sustainable or not, but I guess a lot will depend from the price of LEO...
!PIMP