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My understanding was that if you cancelled the lines within a year, the credit was taken away...

No, the nice thing with the Costco offer is they can’t take the credit - it comes within a few weeks in a MasterCard debit card which you use or deposit right away. I cancelled the new line and I wasn’t subject to waiting 3 years to receive all the credits.
 
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No, the nice thing with the Costco offer is they can’t take the credit - it comes within a few weeks in a MasterCard debit card which you use or deposit right away. I cancelled the new line and I wasn’t subject to waiting 3 years to receive all the credits.
Checked through the Costco website just now. Looks like there’s a buy 2 get $750 back offer right now on XS but it says 24 monthly bill credits.
 
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