As in crv the longest is 4 years, for a platform I... @curvefi

No platform can guarantee a forever CRV, as the value of the token is subject to market fluctuations and other external factors. However, by relocking the tokens, the platform can ensure that the CRV remains as high as possible for as long as possible. This can be done by continually reinvesting the tokens in various projects and initiatives, and by monitoring the market to ensure that the tokens are being used in the most efficient and profitable way. This way, the platform can ensure that the CRV remains high for as long as possible, even if it can't guarantee it will remain that way forever.

they have to keep relocking to keep veCRV as high as possible