According to dYdX Foundation, traders who pay $1,000 in frontend trading fees out of a total $10 million in frontend fees can earn $75 from the 750,000 DYDX reward pool. The calculation is based on the trader's relative fee contribution, which directly impacts the amount received from the reward pool. The Foundation also clarifies that users can combine earnings from multiple pools, offering increased incentives for active traders. This fee structure and reward mechanism are key considerations for trading strategies on the dYdX platform, as cited by dYdX Foundation.