It depends on the investors, IEO projects on shit exchanges more likely not interested for investors and the result is also same as shit ICO. But if the project held IEO on big exchange like binance, people will hunt for it.
So, the reason why cryptocurrency is not as boom as 2017, i think the investors are much smarter right now for choosing which project worth to invest, not like in 2017 when every project is success at the beginning but dissappear after it enter exchanges