What is ADAB trying to fulfill?
To conclude this, ADAB need to make sure that the "Food"(Tokens and Coins) that they provide on their "table"(FICE exchange) need to be Halal, as they want to serve these Halal "Food" to the Muslim world ( this is their only concern),the rest of the customer are always welcome disregard whether they are pimps, prostitutes, porn actors or drug dealer. The best thing they can do is KYC and AML to fulfill the require law and regulation.
Many thanks for your very well written post.
In your analogy about you made an error below because even though Halal restaurants will serve
pimps, prostitutes, porn actors or drug dealers but the people who want to open their own Halal restaurant cannot ask for investment or loans and take money from
pimps, prostitutes, porn actors or drug dealers to start their business because it will not be Halal restaurant.
If they want to accept money from
pimps, prostitutes, porn actors or drug dealers or are willing to accept money from
pimps, prostitutes, porn actors or drug dealers or will take money from anybody without checking if they are
pimps, prostitutes, porn actors or drug dealers then it will just be a restaurant when it opens to serve the public, it will not be a "Halal" restaurant.
That is why the source of funds must be vetted otherwise the word Shariah should be removed.
Come back to the point of argument, Not sure about your logic behind for completely Halal during business setup but "Halal" can be ignored after setup and start doing business and earn some "not Halal" money unless you are talking about a double standard here.
A situation may arise that, this particular 'Halal Restaurant' manage to make enough money ( include some 'not Halal' money from pimps, prostitutes, porn actors or drug dealers as they never asked who they customer is) to start another 'Halal Restaurant', indeed there are many chain Halal restaurant in Asia and UK.
The developer of this project might also argue that, if they indeed received some 'not Halal' money from public funding (which they won't know), is a good deed to change something not Halal to something Halal (not Halal money to a Halal product on their platform) instead of the other way round - from Halal to not Halal.
A cup can be half empty or half full, depend on how you look at it, Muslim can't do without fiat currency, although currency had been used by many criminals and gang, is a two-edged sword, is all depend on how you use it.
The above is only my personal opinion, whether to invest or not or whether ADAB is a Scam or not please do your own due diligence..