I have not shopped in Canada, but am under the impression that opportunities there are not that different than in the States.
Yes, it is easy to make an average of better than $100 a day, especially if you are willing to put in the time and travel a couple hundred miles from your house. There is a tremendous amount of advice in various threads on this forum. Mystery shopping is a good way to keep money coming in while somebody is between jobs.
Hard work builds character and homework is good for your soul.