I think investing in IEO will reduce the chances of being cheated to zero percent. But yes you have to choose the trusted and popular cryptocurrency exchange market to do IEO.
NB: No one is being encouraged to invest in the cryptocurrency market here. The information is only for those who trade cryptocurrencies at their own risk.
IEO was conceptualized because good and legit projects cannot move and get funded because of the lack investors unbelief of ICO, so many investors have been scammed by ICO that investors have stopped looking on ICO for a new coin to invest, IEO is a big help to connect projects and investors, and it's a win win situation to all, just be sure to pick the project that will go a long term.