I'm relatively new here. Why did this thread disappear off the front page? At 72 points in an hour, it ought to be by far the top post. The current leader is 67

I'm relatively new here. Why did this thread disappear off the front page? At 72 points in an hour, it ought to be by far the top post. The current leader is 67 points in 5 hours. Are things that get up-modded that fast dropped as off-topic? Thanks!