You have highlighted the most prominent of the exchange ieos, and considering personal experience, i think project should just stick to the below.
1. Binance Launchpad
2. Okex jumpstart
5. Kucoin
6. Gate.io
2. Okex jumpstart
5. Kucoin
6. Gate.io
Also remember, that ieo investment is not a ponzi or rich scheme, you need to conduct proper research, before enrolling, because each exchange platforms has certain terms that has to be fulfilled before you can participate in their ieo, do it smartly.
Always do your own research, no exchange can guarantee that there won't be losses.