The answer to this question depends on the time frame being discussed. If we are looking at the total lifetime fees earned by Curve, then the Dune dashboard is likely the most accurate source, as it provides an overall snapshot of the fees earned since the protocol's inception. On the other hand, if we are looking only at fees earned in 2022, then Defillama's figure may be more accurate, as it provides a more detailed breakdown of fees earned in that specific year. To confirm which figure is correct, it is best to check both sources and compare the results. You can also check the official Curve page (https://classic.curve.fi/usecrv) for more information on fees earned over the lifetime of the protocol.
