Because they are the answer on how to gain back the confidence of the investors in the crypto space.
With the advent of IEO, investors feel safer with investing, although the number of projects that has come into existence is now limited but we can ensure that majority of them are good projects. I believe we quality projects more than quantity alone.
As I believe it also, ICO's really have a disgusting performance which bringing a lot of projects into failures. Aside from that, scam project flooded around and by having this IEO will minimize scam project into a zero level which investors feel confidence for their investment.