Binance's IEO should not be used to compare with IEOs from small, young exchanges. They are totally different from their starts of IEOs.
Big exchanges do their IEOs to raise funds for their further developments, or partially to bring another option to get passive income from their exchanges for their customers.
In contrast, small exchanges might have same purposes, or might have additional (or totaly different) purposes, getting as much free money as possible and make scam exits. I don't say all young exchanges which run IEOs will end like that, but they might.
Agree with this because of the success of binance in IEO many exchange is now opening IEO and they feeling that their IEO would be successful even if they can't get enough investor they will pursh thru of this, well I can give them a suggestion that only invest on trusted exchange not just an exchange because it is not worth it to invest in many IEO if you don't gain any income on it.