OKX has officially extended its Spark USDC bonus SPK token promotion, adding a new prize pool of 4,000,000 SPK. Users who subscribe to this product will receive corresponding additional SPK rewards, with no upper limit on subscriptions and a maximum annualized yield of 10% (including Spark Protocol's base yield and a 5.5% real-time activity annualized yield). Existing Spark USDC users can continue to receive rewards without redeeming their tokens. Users can access the OKX app by going to "Explore," selecting "Earn on-chain," selecting USDC, and setting the income source to Spark. Enter the subscription amount to complete the subscription. Alternatively, users can access the OKX website by going to "Finance," selecting "Earn on-chain," selecting USDC, and setting the income source to Spark. Enter the subscription amount to complete the subscription.