Overview- Calculating Totals, Avoiding Double-Counting
Total Earn Holdings
Sum up all individual iEarn contracts in USD, which can be found here.
These are yWBTC, ySUSD, yTUSD, yBUSD, and two versions each of yUSDC, yUSDT, and yDAI.
Using individual contracts is more accurate than using Curve pools because users can directly deposit into contracts.