How many IHG Rewards Club members are there?

Related questions

1. What are the IHG reward levels?
2. What does IHG Platinum Elite get you?
3. What is IHG Rewards Club?
4. How many points do you need for a free Marriott night?
5. Do IHG Rewards points expire?
6. Can I use my Hilton points to book a room for someone else?
7. How do I transfer IHG points to another account?
8. Does Holiday Inn have a rewards program?

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