Very interesting buddy. I've noticed this and people are making good amount from this IEO. I think it's a nice idea especially when they do the IEO on a major exchange like IDAX. Now IDAX and Exmarkets are some of the exchanges engaging most in the IEOs.
I had noticed that recently Idax have an issues for scamming CMA, XCT during IEO worth millions of dollars but still IDAX platform was still on top of the exchange in the market despite of what of what happened. Then, Xmarket now arising its popularity through IEO programs for every new project comes out now. But it doesn't mean all community shifting now into IEO I think there are still people out there believed in the ICO in my opinion.