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Having observed the blogger's methods for obtaining Alpha, I am now ready to use the second method.
Every day 16+2, 15 days 15*18=270, receive airdrop 5 times, wear 15*3.5=52.5
5 days 16+2, 10 days 15+2, 5*18+10*17=260, receive airdrop 5 times, wear 5*3.5+10*1.7=34.5
In both cases, 5 airdrops are obtained, but in the second method, the wear is slightly less.
I also calculated the first method mentioned by the blogger: 5*19+10*18=275, receive airdrop 6 times, wear 5*6.8+10*3.5=69.
If we assume that each airdrop costs 40U, then the profit will be 6*40-69=171.
Compared to the second method, the profit is 5*40-34.5=165.5, the profit is approximately 5.5U higher, but the attractiveness is not great, so I still decided to use the second method.
Although the probability of obtaining high scores with the first method is still greater than with the second, because after 10 days of use, the scores of the first method will exceed the scores of the second by more than 10 points, the advantage of high scores is still obvious.