Your list with IEO offering-
EXMO
KuCoin
Kuna
OKEX
LaToken
Bitforex
Liquid
Exrates
Instant Bitex
Bitsane
First of all, how much trusted are those exchanges to go with. I am not talking about all of those. Have you contacted with them before offering your service? Are they agree or you will contact them later?
Liquid still is on the list when they were already gone.
Exchanges 2 years ago use to have presence in bitcointalk but the new ones today are just not very approachable like the staff of the past. You can't can question them publicly. Now you will have to fill up a form just to ask them. If I have to conduct IEO on the exchange I would rather ask what I need to know thru their support. I suggest this is what you should do instead.