IEO is just a wrapper for an ICO. Same risks. A scam project can pay the listing payment and can still scam you. It also can happen to new listings listed by Binance.
Sorry, but it sounds funny, especially with the background of how the head of binance said that he did not take money for adding projects to the exchange. I dont think that random projects from unknown people will will be added on IEO of good exchanges. Projects will be very carefully checked and separated by advisers because the exchange itself could fall due to the negative consequences in case of a scam.