I think we see a new thread on this subject every 2 weeks it seems.

I find C&P mostly when I book early. Like 4-6 months in advance. All my nights this year will be points or C&P and I found C&P on 2/3 of the nights including some nights in NYC on 2 trips and San Diego.

Also search individual days. Sometimes I find it available on 1-2 nights but not all 3 so I book separate reservations.