You do not need to hold an IEO or STO if you are doing outstanding marketing, there were enough examples, even in 2018 where there were no IEOs, some projects did well and even collected their hardcap on the falling market.
While this is true, there are other factors worth noting and two of those that give IEOs an edge are as follows:
1. Trust: Most ICOs are met with skepticism and the fact that exchanges vouch for the projects they perform the fundraising for, investors are most likely going to trust IEOs more easily.
2. When Exchange??? - I'm sure you know what I mean.
