GMX showed that sustainable revenue sharing model can exist in DeFi space so I personally believe it can be long-term model(except exploit/systemic/the whole crypto risk obv.)
Proof of their progress is as follows (by Q1 2023) :
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TVL has been growing consistently despite the bear time (1st picture)
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Revenue has been growing (2nd picture)
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Big amount of partnerships/announcements and projects built on top of GMX (Source: https://twitter.com/GMX_IO ) Show Less