You thread is funny  but I think everyone one has his or her own view when it come to cryptocurrency.Generally, adoption is the key features and trust. IEO will replace everything with time. Just check out Gexan project. You will be amaze.

Cryptocurrencies have pretty much been a topic of intense discussion over the last few years, at the same time, stories of people who lost hundreds of thousands of dollars hoping to make a quick buck.
So, if you are looking to invest in crypto in a safe manner, then this GEXAN COIN for you.
The team to create an autonomous decentralized lottery platform.

In an IEO there is more authenticity than an ICO. Since it is hosted on an exchange platform, both the investors and the developers will be checked for their authenticity.
The investors stand a lower chance of losing their funds because the whole process undergoes strict verifications.
Talking about a successful IEO, Gexan was able to sold out their coins in just 2 days on P2Pb2b exchange and the same thing on VinDAX. Just as many other project that have successfully sold out like bitTorrent on Binance and they doing well in market.
With this, I will conclude that IEO is much better