"KuCoin CEO Michael Gan told CoinDesk the exchange’s first IEO in April raised $4.2 million worth of crypto. However, it’s more accurate to think of such sums as a rate of distribution rather than earnings. It’s unclear how much exchanges themselves earn from IEOs."--https://www.coindesk.com/binance-okex-and-kucoin-are-using-ieos-to-command-the-spotlight
More of other exchanges stands in their ieos we're all included in the article! A must read for everybody.