It's been a month, I've earned nearly $100, received rewards for three tasks, hippo16u, order24u, and the pros' btcb40u which actually exceeds $100, because the two subsequent tasks for pros are not included, also adding up to 40u. As for costs, gas wear and token depreciation, I've lost 20u, so my net profit is also 100u. As you can see, with casual activities, just by moving a finger, and asking friends and family to create a few more accounts, one can easily earn 3,000 to 5,000 RMB in a month, without much effort.