Please while investing in the IEOs don't forget to investigate most of those exchanges because very soon scammers will soon take advantage of the IEO.
This is just another level up of ICOs.
There's a guarantee that these coins who will avail or join the IEO will be on the list for that specific exchange. In every type of investment, we all should 'DYOR' before investing.
It wouldn't be surprising if IEOs will be a place for scammers too, they always come up of something that they can take advantage of.