If you study in detail, you will come to know that IEO is kind of updated form of ICO and has actually offered great features to cover the problem that have been wide and large in the time of ICO. You get to invest in a good project is enough good IEO is doing the investors because the digital exchange always make sure they evaluate the project before conducting IEOs and listing the tokens.
IEO is an advanced form of investment compared to classic ICO. This is a great opportunity to invest in reliable proven projects. This minimizes the chances of getting on a scam project and losing your money. I myself was losing money on ICO and now I started investing in IEO again. By the way today there will be a very interesting IEO from the Gexan project. If anyone is interested in investing, I recommend to consider this project. These guys are very cool!