It seems they have already shut down the service voluntarily today, citing law enforcement measures towards them. See the announcement on
https://exch.cx.
I had tried to access their new main domain (exch.net) earlier and got an error. In light of the announcement, it is likely that this domain was taken down, leaving only exch.cx and the onion domains active.
Best wishes for the exch team and R.I.P. to an excellent service.
Apparently, it was a good service if the regulator forced this project to close. It's like a kind of quality mark for users in such cases. Is the reason for the pressure from law enforcement agencies the privacy-oriented nature of this platform?
I was not a user of this service, but the lack of registration and automation of exchange looked attractive.
Has this service worked for more than 10 years? It's a pity that such things happen and apparently, the Internet will become finally
non-free and not private, and the fate of similar services will expectedly overtake the fate of eXch.