This is fantastic project! When exchange?

Yes, PIRATE is a fantastic project, afaik komodo team is working on details for how centralised exchanges could list a coin like this with only anon z transactions by default. Some technical things to work out, but hopefully soon we can trade this wonderful addition to crypto privacy, fungible digital cash!
Can someone explain why centralized exchanges (eg binance/bittrex) will not list a only anon z transaction coin like this?