I've got some Canadian club mates, and talked to others, and I think you just don't get the good offers up there for whatever reason.
As you say, to each their own. I recently did a Tapjoy that required my attention for about 1-2 hours per day for 2 weeks that paid close to 38k credits just for the game, and then I did $60 worth of in-game purchases for another 31k credits. And the 1-2 hours per day weren't straight, only a minute or 2 here and there. I fired up that game on Android tablet right next to where I was playing WGT on the PC so killing 2 birds with 1 stone so to speak.
To me it was worth it, but not all get those offers, or may not be their cup of tea I guess. At 10 credits in 9 minutes that I recently got watching videos, I'd be watching them for a decade to accumulate 69k. I probably won't even be around this game that long, LOL
Happy to hear the surveys are working out for you!