A chart to tell you if the current Alpha can still be brushed?

Assuming you start brushing 15 points for the first time on August 8, plus a balance of 2 points, that's 17 points.

Currently, the airdrop threshold is approximately stable at 200 points, so you can qualify for 4 times in a month, but the key is that you have to grab it. Each cycle is about 15 days, roughly 2 times.

Each airdrop counts as 50U, so the income for one cycle is 100U, and the loss in 15 days is approximately 4Ux15=60U (not counting the losses from bad luck), resulting in a cycle profit of 40U, which totals 80U in a month.