Well, "rather"?
All I can say is that I have an offer with that code listed that matches your description. Of course I don't know what madness QRPC holds in store, perhaps they had several similar promotions at that time. Based on the reply they gave you, not even they know. But if it helps, this is the full text:


Travel the world with Qatar Airways

Start your journey from any of our US destinations and fly to more than 150 places worldwide with Qatar Airways.
Book a flight at qatarairways.com or our mobile app until 21 February 2017 and earn up to 4x (300%) bonus Qmiles in Economy Class* and up to 3x (200%) bonus Qmiles in Premium Class* for flights departing the USA until 30 November 2018.
For example, book a Qatar Airways flight from New York to Bangkok in Economy and you can earn enough Qmiles to redeem a complimentary one-way flight from New York to Chicago in Economy Class on one of our oneworldŽ Partner Airlines. For the same journey in Premium Class, you can earn enough Qmiles to redeem a complimentary one-way flight from New York to Chicago in Premium Class with one of our oneworldŽ Partner Airlines.
Please ensure you quote your membership number at the time of reservation or check-in.
* Earn up to 300% bonus Qmiles in Economy Class promo, Saver, Value and Flexi. Or up to 200% bonus Qmiles in Premium Class 150% bonus Qmiles in Economy Class. Terms and conditions apply, please review at the time of booking.

Should you have any queries regarding this offer, please quote the offer code: 1801AM143 when you contact our Member Service Centre.


Terms and conditions

● This offer is only applicable to Privilege Club main members booking through Qatarairways.com or Qatar Airways Mobile App for journeys originating from the United States of America.
● Offer is only applicable for bookings made between 6 February 2018 and 21 February 2018. , Travel should be completed between 6 February 2018 and 30 November 2018.
● Blackout period 15 July 2018 to 26 August 2018. Members travelling during this period will not earn bonus Qmiles.
● To be eligible for this offer, members must:
● Register for this offer on or before 21 February 2018 by logging into their membership account at qmiles.com and selecting "My offers" form their dashboard menu.
● Members whose travel date is before 21 February 2018 should register at least 24 hours prior to travel.
● If the passenger is not a Privilege Club member they can enrol at qmiles.com; offer registration will be available for new enrollees within 24hrs from the time of enrolment.
● Ensure they quote their Privilege Club membership number at the time of booking or check-in.
● Members will earn bonus Qmiles over the base Qmiles earned on Qatar Airways flights during the offer period. Tier bonuses, promotional bonus and family accrued Qmiles will not be taken into account in the calculation of the offer bonus.
● Offer is applicable only for flights marketed and operated by Qatar Airways.
● Bonus Qmiles are calculated based on the combination of booking date, flight date, cabin and Fare Family purchased.
● In case of over lapping campaigns, members will get the highest bonus Qmiles.
● Members may use this offer more than once during the offer period.
● Members booking their ticket through a promo code or any other private fare discount will not be eligible for the bonus Qmiles.
● Bonus Qmiles will be credited on the outbound flight from USA. Blackout dates apply.