When a pool gets too low in hashrate then that is the worst gambling since the % difference per block is large.  (4/5 vs 5/5 is 20%.  99/100 vs 100/100 is 1%)

Last year the same thing started to happen here and Kano went out and paid big pool operators to avoid being in quicksand.  Seems it's back to that again.  Unless you are able to extend your timelines to years instead of weeks to even things out.  If you go too far then the reward halving will draw the line and then future luck ain't the same reward so you can only correct till that moment.