i registered for earn nights faster promotion. do these nights need to be booked with cash or they could be points and cash bookings?
(or just points

)
here are the terms
DISCOVER OUR BRANDS
Stay at 2 brands and get 16,800 bonus points.
Must be an IHG® Rewards Club member and must register your member number in advance to participate in this Offer ("Registration"). Number of bonus points listed above will be awarded after the required number of qualifying room nights have been consumed by the member at the required number of distinct IHG® brand hotels between 15 January 2019 and 30 April 2019 (both dates inclusive) at InterContinental®, Crowne Plaza®, Hotel Indigo®, Holiday Inn®, Holiday Inn Express®, Staybridge Suites®, Candlewood Suites®, Kimpton®, EVEN®, avid™, voco™, Regent® Hotels & Resorts or HUALUXE® hotels worldwide. Stays at Holiday Inn Resorts®, Holiday Inn Select and the Holiday Inn Club Vacation® properties count as Stays at the Holiday Inn brand and Stays at InterContinental Alliance® Resort properties count as Stays at the InterContinental brand.
This Offer is subject to the General Promotion Terms and standard IHG® Rewards Club Membership Terms and Conditions and earning structure, which can be obtained by visiting
www.ihgrewardsclub.com. Please allow 2 to 3 weeks for bonus points to be posted onto your account. IHG® reserves the right to remove a member's bonus points or cancel a member’s account if fraudulent use of the Offer is detected. To the extent permitted by applicable law, IHG® Rewards Club reserves the right to cancel, suspend and/or modify the Promotion/Offer at any time with or without notice. To the extent permitted by applicable law, IHG® reserves the right of final interpretation of this Offer.