Very advanced technology of business implementation through IEO. Participants do not send money to a smart contract, such as ICO manages. Instead, they must create an account on the exchange platform where IEO is held. Thanks to the many guarantees from the exchange itself, the participation becomes safe and profitable.
Dont misunderstand the whole concept behind the IEO because it was a system implemented by new project owners to make investors believe their project is real due to ICOs scams happening lately and it does not guarantee the team itself own scam,rob investors or abandon the project in the coming future.