Fundraising in the IEO format began to be carried out due to the fact that many more fraudulent projects began to appear among ICO projects. In this regard, fundraising arose through exchanges, which at the same time did some verification of the prospects of these projects. This turned out to be better now than a regular ICO, but IEO is better only for this time. I think that when states organizationally begin to regulate the activities of ICOs and the level of fraud among them falls sharply, the popularity of ICO projects will rise again. Fundraising in the IEO format through exchanges is more effective, but it cannot provide everyone. In addition, many projects vseravno first conduct an ICO in order to provide advertising to the project, and only then IEO.