But IO does not seem to be very good at respecting the rules, as I remembered above on this thread that he claimed that a VFR pilot entering IMC should tell the ATC that he is VMC...
I didn't say he "should". That would be illegal
"Then why won't the issue a foreign instrument pilot rating after passing the theory to IMCR holders?"
Because the IMCR is non-ICAO, could be one reason.