as we see now many project are using IEO system to collect funds from investors and I feel IEO is very popular at the moment, besides that I also see a lot of IEO that are currently successful, therefore I am sure that the price of ETH will definitely increase too if many project use blockchain from Ethereum (ERC-20). because as we know in 2017, where ETH prices increase very high due to ICO very popular and successful, so if this year IEO will experience the same thing as ICO in 2017 (popular and successful) then it will make ETH prices increase again (bull run).
not like that, don't you see that the exchange has its own token? yes, I think the main goal is to keep the price of the token itself and the IEO does not have a major impact on the current ethereum price increase or as long as the bull run later.