If a Hugo Award category goes to No Award two years in a row, the category is permanently canceled.
This is not true. It never has been true as far as I know. It certainly is not part of the WSFS Constitution.
All I can figure is that there are a bunch of people who want this to be true, so they convince themselves that anything they personally want must be the actual rule. Actually reading the rules is Too Much Work. Much easier to just Make Stuff Up.