IHG Rewards Club has a new “Anniversary Bonus Offer” promotion for 1,000 bonus points for one stay within 90 days of signing up for it.
Edit: This offer only works for one stay and not for unlimited.
You can earn this 1,000 bonus points unlimited number of times during the 90 day period.
Note that this offer is combinable with all the other IHG Rewards Club promotions that you can find here.
You should sign up for this promotion when you have your next IHG coming up to maximize the 90-day promotional period. The expiry date of this promotion is unclear.
IHG Rewards Club has had similar pormotions in the past. This is a great bonus offer for those that have number of stays coming up within the 90-day period, as you can earn it unlimited number of times.