With all those useless coins now held by Tradesatoshi, like you said they will not be able to do anything with them. They could have changed them for BTC/LTC/ETH themselves while their rightful owners were held in locked-out accounts - that is a possibility.
Ultimately the best result is Tradesatoshi has closed down. Their owners and operators are probably looking at opening up again using a different company name with minor CSS changes to their exchange code. I hope the law enforcement agencies get their act together and investigate these scammers then make an example of them by jailing them after they get their day in Court.
It is all over for Tradesatoshi. They said they close on 1st March 2020 and they certainly did that, stealing lots of crypto as they left and closed to the front door.
The website will not be going back online, their exit scam is complete.
The only good part in this is that most of the shitcoins were only traded on their exchange so once they've closed shop they can't do anything else with them anyhow.
Coingeko is showing volumes between 10k and 30k on average for February, I hope this means not that many
BTC were lost.