CI+ CAMs usage in UK

[MeanMachine]

Hello,

I have been reading around a bit to make my CI+ CAM work with OpenViX. It seems to me the CI+ CAMs (and CAMs in general) are rarely used in the UK (I'm not located in the UK). Is this indeed the case? None of DVB-S/C/T services make use of CAMs? Are closed boxes sold for all the services? I know this is the case with the Sky UK service, but wondering about others.

Regards