About a month or two ago I participated in the XEM-XYM airdrop. Binance was one of the exchanges which participated in this airdrop. It took about 3 weeks before the coin was listed on my wallet. Then it took another month before I could even withdraw it. In the meantime the coins price has been declining heavily. Worst of all, all this time the coins price was displayed wrong on the binance app.
Really lost my trust for any future airdrops.