As long as IEO has been running by the major exchange sites and im sure there was no problem with it. The demand was so big. You must also aware if the fact that these days IEO was always doing so well even during the bearish market. Once IEO will be launched through binance and there would be a profit guarantee for you caused by binance was full with the whales who will be pumping the price of the new token. IEO will always become the best way to launch the new project.
The demand guaranted by the exchange site and it will always be traded in a big profit after the trade already started.