American AAdvantage: Earn up to 4x Miles for stays at IHG Hotels Worldwide until July 31

This offer awards triple AAdvantage miles on all IHG stays
except those at Crowne Plaza which will earn quadruple miles! This offer
is good for those who may not be planning many IHG stays where they
could do better with an Accelerate offer credited to IHG Rewards Club.

Offer details:

Earn up to 4x AAdvantage Miles for stays at IHG Hotels Worldwide. Full details, online registration and booking (Registration is required) Until Jul 31, 18

Triple miles awarded for stays at all IHG brands except Crowne Plaza
Hotels. Stays at Crown Plaza Hotels will earn quadruple miles.

Excerpts from the T&Cs:

Must be an IHG® Rewards Club member  with a registered address in North or South America with
American
Airlines AAdvantage®miles as the chosen earning preference,must
register member number in advance and must be in good standing in the
AAdvantage® program to participate in “3X/ 4X the miles” campaign.
Triple miles will be awarded on all Qualifying Stays after completing
1st Qualifying  Stay, between May 15, 2018 and July 31, 2018 (“Promotion
Period”) (both dates inclusive).  Quadruple miles will be awarded on
all Qualifying Stays at Crowne Plaza® brand hotels  after completing 1st
Qualifying Stay,  during Promotion Period.  Bonus miles multiplier will
be based on the current base  miles awarded per IHG hotel brand. 
Member will only receive bonus miles for one offer for each Qualifying
Stay (i.e. – a member who is registered and completes a Qualifying Stay
at a Crowne Plaza will only be eligible for the 4X offer).  Maximum
bonus award is 15,000 bonus miles per member during this campaign.