Which FAQ covers this?

[Amanda]

Where is the discussion of "why did Crouch/Moody bother with making the
Triwizard Cup into a Portkey instead of just whisking Harry away at any of
the other many convenient times?" (which I suppose is right there with "why
do the two Portkeys operate differently?").

I'm combing through my inbox, culling, and saw that last week somebody
mentioned a theory that I had espoused, along with several others, that
explained the first. It comes up periodically; I wondered if it were in the
FAQs.

--Amanda