IEO same as ICO for me no different, projects in IEO can mak also loss money, most of us think IEO is the best way to invest and i think the best way to invest by trading or hold BTC
on the profitablity, IEO is better than ICO right now. you can do you research and will found that fact
most of successfull IEO comes from binance, it reached so much money from investors
in the price listing is almost all coins are more than its IEO price. even can get more than 10 times, that's why i say IEO is better