IEO is the ICO 2.0. Since it's the ICO is held on exchange, this is way safer than traditional ICO which is prone to scam. Also it is easy to market because investors are confident so that IEO will meet their hardcap in no time.
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.
No. IDAX is no longer a reputable exchange to conduct an IEO. They scammed for over 5 million dollars. One of the bounty(CMA) have joined claims that they have been scammed by IDAX. And I found out that they're not alone coz there are more projects break their silence and took a stand against this exchange.
https://medium.com/@info_85454/idax-pro-scammed-crypto-projects-for-up-to-5-000-000-usd-c2d10a0dd14e