Because of the $ 300 annual cap on rewards, the higher savings rate doesn't make sense, and you'd be better off using a gas credit card with unlimited rewards. (valuepenguin.com)
Note that annual cap of $ 250,000 on combined gas station and office supply store purchases. (cardratings.com)
However, based on the rates included in the fiscal forecast, the 5 - cent annual cap is in effect to 2015. (3dpolicy.ca)