I redeemed PcPlus Points at Superstore and Optimum points at Shoppers Drug Mart. In case you aren't familiar, PC Points is a system used at most Loblaws Inc. stores across Canada, including Real Canadian Superstores, Loblaws, Independent, No Frills, Valu Mart, CityMarket and a ton of others depending on where you live. It offers points, both in-store and digitally, for buying certain items. Read more about it here.
Yes, points can take a while to add up (it's much faster if you load extra offers digitally though) but either way it ends up being free food with very minimal effort on our part.
Here is what I got yesterday by redeeming 30,000 PC Points ($30) and 8,000 ($10) Optimum Points. I also received 2,500 PC Points from my shopping trip which will amount to another $2 . 50 free groceries in the future.