If your normal cashback card gets you 1% back, then this gets you an extra 5% back for 6 months. Or $175 more than normal. Which would be what the bonus is worth. It's pretty decent for actual cash.
I am planning to sign up today for the BMO Air Miles World Elite Mastercard.
https://www.lowestrates.ca/blog/finance/bmo-air-miles-world-elite-mastercard-review Apply and spend $3000 in 3 months for 3000 air miles. First year fee waived.
3000 air miles is worth at least $300 if you use cash miles. Redemption can get a little bit better if you use dream miles for certain things. I did the bulk of my redemption on Disney tickets but the cost just spiked significantly, making it not worth it anymore. I am thinking of redeeming for flights this year, despite the crazy taxes & fees. This card comes with a Companion pass of sorts where you pay for both tickets...then they refund you the air miles for one ticket. So might be worth it.
Another one you should look at is the Scotiabank Gold Amex. It takes a LONG time to get your points (I reached my minimum spend in May and still have to wait another month or so). I got it under a promo where I got $60 in gift cards from ratesupermarket for applying plus 30,000 points (worth $300 in travel) for spending $750 in the first 3 months. Not sure how redeeming the points will be like but I'll find out soon!