I'm pretty sure the T&C are the same for everyone. To quality you opt in then make an eligible purchase of $25 or more to get the 250 Bonus Miles. Then the next week you get the other amounts. Thursday to Sunday and only one purchase per week counts.
Terms + Conditions
This offer is not transferable and is valid only for the BMO AIR MILES Mastercard cardholder who received this offer invitation email. Offer valid each Thursday to Sunday between December 15, 2022 and March 9, 2023. To qualify for the AIR MILES Bonus Miles, you must first click the "Opt in" button from the offer invitation and then i) make an eligible purchase of $25 or more, in a single transaction, on your BMO AIR MILES Mastercard or make an eligible purchase of $12 or more, in a single transaction, on your BMO AIR MILES World Elite Mastercard at any Metro location, excluding Thunder Bay, or online at metro.ca to get 250 Bonus Miles; then, one offer period later ii) make an eligible purchase, in a single transaction, on your BMO AIR MILES Mastercard or BMO AIR MILES World Elite Mastercard at any Metro location, excluding Thunder Bay, or online at metro.ca, as follows: a minimum of $60 to get 50 Bonus Miles, a minimum of $100 to get 100 Bonus Miles, a minimum of $250 to get 250 Bonus Miles, or a minimum of $500 to get 500 Bonus Miles. All eligible purchases exclude tobacco products and any other products or services that we may specify from time to time or where prohibited by law. Limit of one (1) eligible purchase transaction per collector number per week (Thursday – Sunday) for both the 250 Bonus Miles offer and the tiered Spend and Get offer. The maximum number of Bonus Miles to be earned in connection with this offer during the offer period is 2000 Bonus Miles. Purchase transactions do not include cash advances, balance transfers, interest charges, fee payments, credit or debit adjustments, or any other amounts that may be charged to the account. To qualify for this offer, your BMO AIR MILES Mastercard account must be in good standing at the time the Bonus Miles are awarded. This offer can be combined with other offers. Please allow up to 90 days after the promotion end date for Bonus Miles to be posted to your collector account. Offer is subject to change without notice.