Why would IEO need to return when it isn't gone yet? 90% of new projects since 2018 used IEO crowdfunding, this year alone many projects used binance IEO launchpad to raise funds and no single one failed, take it or leave it IEO beats ICO marginally, I missed the ICO success of 2017 but that's gone already and its never coming back, few new projects still use ICO because they have the full confidence of raising funds due to the quality of their projects