IEO is just the next step in the fundraising revolution. People just needed a guarantee that those tokens would be listed on exchanges direct after the token sale for liquidity. Without a serious exchange, there is no chance that a project can be profitable.
because in IEO campaign investor fund are safe because between investor and developer are escrowed by exchange when the project launched IEO.
this alternate way to invest in the new project, when our fund are safe and the project guarate listed in the exchange