There are many ways to be anonymous in crypto. They will not be able to screen all the investor profiles for that matter. Pretty much a scam to me.
Yes you are right. No company will be able to sceen, filter and assess ALL investors therefore by default this cannot be a Shariah or Halal project.
The only thing it can be is a scam. Adab exchange = scamBecause they have no vetting system in place to ensure investors buy in to the ICO with Halal/permissible money, it means (by default) they are willing to take investment from the following and more:
pimps
prostitutes
porn actors
those currently behind bars in prison serving prison sentences
those that sell drugs/narcotics
those that manufacture, test and sell weapons
those that own publications online/print media cursing Muslims and those that have anti-Muslim agenda
those that own, transport or sells alcohol
Any investment from the above and more means the project cannot be "Shariah" compliant yet these clowns say they are offering a Shariah compliant exchange?
Pathetic scammers trying to fools Muslim and wider investors...

This is not a good situation of crypto, and it needs a serious action from the muslim Government in order that those people behind scam attempt will be pursuit by their law enforcement team. The reputations of crypto will be destroyed if this type of transactions will continue to victimized people, and because of this crime crypto users will be decreasing in numbers.