Honestly I have never bought or participated in buying IEO tokens, I would choose to buy an IEO token at Binance because now it is more trusted and feels safe and comfortable with the exchange.

>> Minor update (see changelog): Perlin added

Hopefully you guys had more luck in the lottery than I had. 

>> Minor update (see changelog): D Community added

It's amazing how much funds were raised here. 
And congrats to all who managed to sell at ATH. A 12x is quite impressive.

In the changelog you can always check at which time I added an IEO to the overview.
Apparently Tokoin performed very well later on.

Of course the ROIs can change daily. It might be a good idea to let a little more time pass until I add an IEO to the overview.

By the way, congratulations on your participation. 

I updated the ROIs for Tokoin! (see changelog)

What you mean? There is lot of exchange and token/coin on OP. Are you sure you read OP not just read a title? OP already mention with clickable link and how much ROI of coin/tokens.

>> Update (see changelog): Colletrix, Whole Network and X-power Chain added

Let's see how long the IEO hype will last.
Huobi has even delivered his best performance ever with Whole Network.

Great effort OP! I just want to ask, how comprehensive the list is? When I went over each one of them I was extremely surprised that not a single IEO has a negative ROI. Am I seeing it right? That is really astonishing considering that the altcoins have been at the receiving end of Bitcoin's rise in the past few months. Or does the list comprise only of a little percentage of the total number of IEOs conducted?

I'm not quite sure what you mean.
The list should contain all IEOs of the named exchanges.
Of course, there are many more exchanges that hold IEOs.

I think you're reading the ROIs wrong.
For example, look at the IEOs on bitforex.
A ROI of 1x means you can sell your tokens for the same price you bought them.
A ROI of 0.5x means that the tokens have lost 50% of the initial price, thus your ROI is negative.

That's expected, that's why people are preparing for this, but I'm happy to see that OP is updating the thread and I've seen that not only Binance are making investors profitable but other exchanges as well. It's just that Binance are more popular since they are also the most popular exchange for now, but based on the list in OP, Binance is not the most profitable exchange that host an IEO.

I'm amaze how big the return of this IEO.