There are only a couple brokerages in Canada that are not associated to the major banks. I really have no idea why my particular brokerage is so "open", but it's nice not to have any barriers.
It really doesn't surprise me that there is no other apparent interest in CRGP...with other customers at my brokerage or elsewhere. It's only got a small cultish following right now. It is near impossible to do any type of definitive DD on it and it has been put in the purgatory of the Expert Market. There are FAR better trades out there unless you want to spend at least a week combing through the history of CRGP to make an informed decision.