It look amazing, but how you guarantee the investors will not lose there money?how this work.

I think invest in IEO is the good way  rather invest in ICO, many ICO is scam now, and do not trust it, but we need also to research about good IEO

We shouldn't think about exchange rather than the project. This bad idea, and not good way to invest, big exchange gives the project trust, many go to invest due to this project for example in binance, and forget to research about the project.

I think most of coins will reach a max supply after at least 100 years, so no need to worry this time.

A lot of altcoin come every day, so not easy to choose, but some time you may find good project to invest, but still on risk.

Let me ask a question, if you own something, and has a good value, will you throw it away, i don't think so, most of airdrop has no value and waste your time, if the project is good, and it's coin has a value never go to airdrop.

I do not believe coins/tokens with very high percent of airdrop can success, after coins go trading all holders sell their coins to gain profit; they do not care about the value as it is free which case the price drop.
I never participate with airdrop like this.

Investing not depend on the exchange, it should depends on the project itself, many think only about exchanges and this not true, look into the project, the team, idea, roadmap...a lot should you think about before go invest.

We should know very well that governments will continue to support centralization. It will not create a coin that supports anonymity or untraceable. This is against the government system.

Ethereum has no any new to introduce, one day the price will dump, unless introduce something new to the markets, yes a lot of project now offer smart contract but still early to be popular like ethereum.

You may right in the point of liquidity , IEO in big exchange has a chance to get more investors and attentions but, you miss very important point, what about the projects run IEO, will you participate in the project because it is run on big exchange?
I should check the project carefully, not all the projects can success even in big exchanges.
And in the other side you can find very good projects could not run IEO in big exchanges, so it may go to small exchanges one.
Exchanges never make the projects success.

Multi round should be short time, if it as you said i never participate.
If i intend to participate in any project every point and steps should be clear and according road map and is it?
So be careful many ICOs this days scam, sure not all.

It may forced to do this by the countries the projects registered, and they should follow the law.
But if the project did not register anywhere ( and this may be risky project) you will not find this restrictions.

If you do not like to buy from exchange ( i suggest you to do) you can buy from
https://www.coinmama.com
it is good and easy

Invest in IEO, and go trading if you have some knowledge about trading.
Be aware you should choose the right time to sell and buy.

I advice you to think about IEO, forget ICO, and you can say what is the IEO success factors, and i can say it is many, such as the team, whitepaper, idea behind the project what will introduce to the markets.
This not all but some factors.

ICOs not did but become less trust, most investors go to IEO, it is more save, but you need to choose the project carefully

Exchanges looking for profit only, it is a business, so all exchanges charge very high fees to run IEO, if IEO fail only the exchanges will win
We should research deeply before join any IEO.

I do not agree to send my IDs to any one, if I should pass KYC I should go to exchanges only, never send your IDs to ICOs websites, many ICOs were a scam.

First we should check the project, this will help us to save our time, if the project is good this mean coins come from this bounty has a value and we can get profit