IHG Rewards Club has just launched a new Anniversary Bonus Offer of 1000 bonus points per stay for 90 days after registering. You can earn this bonus unlimited number of times.
Note that you should sign up for this promotion just before your stay to maximize the 90 day time frame. Also, it would make sense to sign up, when you know that you have multiple stays coming within the next 90 days.
It is nice to know that IHG Rewards Club is slowly reintroducing the bonus offers that all expired at the end of March.
LoyaltyLobby reader sent me an email about this offer and it has also been covered on FlyerTalk here.