For example, I currently have 240 points, which meets today's project requirement of 235 points for receiving, and I consume 15 points. So according to 18 points per day, how long will it take for me to gather enough points to return to 240? If I get 18 points every day, doesn't that mean I can receive an airdrop every day?

Why not continue? I don't quite understand this rule. Can't I get 17-18 points every day? The receipt only deducts 15 points. If I refresh every day, I can receive an airdrop every day, right? If I keep refreshing, there will always be an airdrop, at least several dozen U, so why not refresh?