Whatever ICO or IEO, invester is only focus on profit.
Where is benfit , investment will go to there.
I think ICO will come back. After all, IEO is controlled by exchange itself, different exchange refuse other exchange's IEO project. Till now, all(most of) IEO project is rubbish, do you know any IEO project become a great project?
ICO will return back with new menthod, in the future, we can see it happening on polkdot again.