And this is the same host for the exchange and block validation services or do you have several hosts for these services?
If it is the same (and only) host, what happens if this host goes down again and there's no block validation and no exchange services available when clients need them?
The servers for the exchange and the block validation are entirely different and they will be closely monitored 24/7 by the developers and admins since they will be local servers and not leased from an online host.
We cannot trust online hosts with such important matters and that's why we have our own servers.