Maybe the methods are new but they are all aiming at one thing which is "what is the best way to extract money from people" in my own opinion IEO is just ICO with a twist the only difference between both is that with IEO you have a guaranteed listing nothing else and guess why IEO come in play? It is because people stopped pushing money after 95% of projects failed to get listed in proper exchange so ya lets give them an option 100% listing and here we go, people, started pushing money again.