Well, the rewards for pools depend on each created pool, but you are right that there are for a limited period...
Impermanent loss is a reality of every decentralized pool with liquidity providers... If you believe in BOTH tokens in the pair which you want to support, then you don't have this loss... ;)
!ENGAGE 10
!LUV
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@jfang003, you've been given LUV from @ph1102.
Check the LUV in your H-E wallet. LUV changes soon. (2/4)