This exactly! Sure, exchanges are doing an intensive check of each projects before it gets on their launchpads but even Binance cannot guarantee that a project delivers its promises. In the end the biggest difference between an ICO and an IEO, is just that an IEO guarantees the listing right after the sale.
but everything is still risky for investment. there is no guarantee that you will benefit from IEO investments. even though an exchange of binary is also certainly risky in carrying out the IEO. still be careful.