If ICO wasnt been plague by scammers acts ICO will way better than IEO, ICOs are programmed to run on the projects very own website and no any third party involvement at all so any fund raised will go directly to the dev or project team, no loss of funds to scam exchanges,after some successful IEO fund raise on some exchanges they dont bother to send the funds back to the project teams
Based on my own understanding, nowadays IEO was very trending were most of the investors and bounty hunters discovered an alternative way to get profit once again in cryptocurrency. Moreover, IEO was being created or arise because of the ICO, in which means without ICO for sure IEO will not be rise in this business industry in my assessment only. It is just so happened that the scammers find a way out to scam others by using ICO, in fact they can also use IEO too to scam the community too.