Cannot sell if the value is below 20u

#币安Alpha上新 dolo airdrop, bn said, I only handle the airdrop, you just see if the coins arrive or not? Can you sell them, how much can you sell them for, what does this have to do with me bn? Anyway, it's all given to you for free, just consider it as a donation for a pork rice, what more demands can a beggar have?