You may have a point. Two other posts have "Rig for red".
The first is 3574 on Nov 2, 2019. 3575 didn't show up until Nov 11, 2019.
The second 3891 was on Mar 9, 2020. Although there were other posts after 3891 on March 9th, there were no other posts after that day until 3892 on Mar 21, 2020.
Saw this; I still think it could be in connection with anons putting info out there but not saying Q. We’ll see if Q is silent for a while, may be.