I have never heard of one Canuck arrested for betting. Not that it hasn't happened, but not once I have heard or read anything. Also very rare for a "gambling ring" to get charged. Off top of my head I can only think of maybe 3 or 4 times in past ten years where I have read of some bookie getting busted.
Considering that anywhere in Canada you can walk into a 7-11 and place a sports bet, the cops don't exactly go hardcore on the sports gamblers.
As for Canadian banks "clamping down" like they do in the USA. I have never ever had a problem, never. I know of three Canadian companies that rely heavy on "offshore transactions" and they seem just fine. Yes I am sure there are problems, but nothing like the shit in the USA.
To put it in perspective, I had a bank wire from a sportsbook. The bank manager said congrads when he found out it came from a sportsbook. Yep, that's right he congradulated me. Can you imagine what a bank manager at a US bank would say if you said the wire was from a sportsbook in Costa Rica:scared :00hour
Simply put, many Canucks could give two fucks if ya gamble on sports or not. Not to say that it is a "free for all" but you don't have to "cloak and dagger" like ya do in the USA.