The most lucrative hotel promotion for years was Hyatt’s “Faster Free Nights.” You earned a free night every two stays, no restrictions. That has since been retired. However IHG Rewards Club is introducing a new promotion for stays between January 15 and April 15 called “Free Nights Faster.”
Registration (required by March 15) isn’t yet open however the promotion page URL suggests that internally this is called “Multibrand 2019” so I imagine earning will be based on staying at different brands within the IHG Rewards Club portfolio.
And since the offer is to earn “at least 40,000 bonus points” I imagine that the actual bonus and requirements will be targeted, as most IHG promotions have been in recent years.
Of course IHG has been running gamified promotions for awhile with different tasks besides just staying at different brands for some time. So this may just be the next iteration of “Accelerate.”