(Expired) IHG promotion: 2,000 bonus points every two nights

IHG is on fire and has just published a new promotion:

• Choose between two offers
• Offer 1: IHG Gold trial with a two-night challenge
• Offer 2: Earn 2,000 bonus points for every two paid nights stayed, up to five times
• Valid until March 31

For the majority of us, the second offer is more interesting. It appears to be a corporate offer intended for P&G employees, but I was able to sign up.