Data point:

Was fortunate to get the call to schedule an interview yesterday.
Despite being offered dates at the end of Jan and beginning of Feb by the website, the first available date according to a live human (after some back and forth with the scheduling system) was 27 Feb. I learned they are not back-filling January cancellations/reschedules at all.
When the same scheduler mis-dialed me this morning, I asked if anything earlier in Feb had miraculously opened up. I was informed "they" are "cracking down on rescheduling." Not sure what that means specifically, but figured I'd share the info.

Good luck all!