I am totally agree that IEO is more trending now so participating on ieo is also a good thing to do to make a huge profit, but off course we really need to find a great project so we can assure that our investment will be really worth it.
There is no way to get returns easily, and it is also true for IEOs. Therefore, if investors want to get returns from IEOs, they should spend their time to do their own research on exchanges run IEOs which they have interests in. Good exchanges might run good IEOs for investors. Bad exchanges, surely, will bring bad IEOs for investors.