This is now the new trend, every exchange wants to do ieo no matter how shitty the project is. If you are investing in any ieo, consider it a big risk. If it pays off, fine. If it doesn't, we learn.
You should observe first the exchanges that launch IEO because IEO does not mean automatic profit, it is still very risky. There are several big exchanges that are successful on this area and their similarities is they all have large volume. While those IEO that rekt people are from small and new exchanges. Binance is still the top giving a huge roi but their lottery system is what makes it hard to get that sweet returns.