When I wrote about a double points add-on for the IHG Rewards Club Share Forever Americas summer promotion, it was somewhat unclear if the offer was open for all.
This has now been resolved. IHG Rewards Club advertises the double points component dominantly on the promo page itself.
Note that you should sign up for this promotion even if you are not planning to participate to the Share Forever promotion due to too high goals. You would earn double points for your stays fir the July 15 – August 15, 2015, period.
It is good that IHG Rewards Club has now made it clear that this double points promo is open for all that have their account address in the Americas. I still need to do roughly 10 nights to reach the goal of 33 paid nights during the promo period.