IEO has become a new trend of investors and this type of investment has been very popular recently. I think the current IEO projects at the big exchanges can help you make a big profit if you're lucky and don't spend too much time waiting. In my opinion, it is best to participate in IEO at Binance, Kucoin or Huobi because these are the 3 best exchanges for everyone.
Currently, ICO are risky because 99% are scams and are not encouraged to invest because you can lose money anytime if the development team disappears.
That's why I no longer interested investing in ICO anymore and I discouraged my friends investing on it as well, for IEO, I am investing in some reputable exchange but of course it also depends, I become more wiser now and just don't invest in some project because of the hype and the good market they bring but because they met deadlines, roadmaps and they have real products
Investing in IEOs with a reputable exchange is the forward towards avoiding scams associated with ICOs exchanges are more or less like a regulator for IEO of course the wouldn't want to disrepute their exchange due to shady deals while IEOs might not be as profitable as ICOs nevertheless investors confidence is most Paramount and restored.