IEOs , especially scam IEOs are much worse then ICOs, because it is likely double scam. Why do I use the phrase double-scam here? First, scam exchanges started their platforms to catch money of traders, their money will stuck on scam exchanges when those exchanges turn into scam exits; second, they started IEOs for their exchanges in order to catch another flow of money from investors, whom have interests to invest into their scam platforms (investors don't know platforms they invest their money are potential scam ones). That is why I use the phrase 'double-scam IEOs' for scam exchanges.