Yes many investors now do not invest in anyone ICO but many investors have accepted IEO very soon. Actually if a project fails to raise ICO fund then IEO will help us to increase fund.
If there is useful IEO, it is important to have professional exchange there. I'm very impressed about IEO which have added big exchanger.
The better part of the IEO is that we can see the real value of the collected money. Also we can see how much team is interested in the project's future. How many did they pay for launching, which exchange, how fast they collect money. It all takes a place.