I was very much interested in investing to such IEO. Thus, made me the urged to browse the internet and found some compelling informations. I found it very informative for some members here like me who are disoriented between IEO and ICO.
Here is the infographic that is worth to share.

Here is the
SOURCE It's better if you read the whole article to enlighten your confusions about Initial Exchange Offering (IEO).
Investors are fed up with ICO projects. They lost most of their money on projects that were completely scam or on projects whose token never got price higher than they paid for.
Investors wants some sort of safety. There's a lack of trust as there are no regulation among ICO. On the other hand IEO's are handpicked by experts from an exchange. IEO picked by legit exchanges would have some credibility as it would also be the matter of exchange's reputation.