Switching to use IEO as a fundraiser could be a good option to go with since some peoples find it hard to directly trust the project themselves. Its not that there is much like a major difference between ICO and IEO but I think scammers operating behind a project has somehow played a role in IEO's success.
Right now there are very less people who still like to invest through ICO's and its for the best when we are dealing in crypto world.