I've done the math on Airmiles and haven't been able to get the reward yield on any redemption higher than 0.65% with the BMO 1/$20 card. So for every $1 you spend on the card you get $0.065 back in rewards.

You're far better off with any 1% cash rebate card, but take a look at your usual spending and the $39 fee on the Scotiabank Momentum card with the 2% cash back on some purchases might be worthwhile.

--B3