Originally Posted by
jfkeze
some routes seem to have dried up... wonder why?


They'll eventually all dry up. It stands to reason.
One day someone will actually legitimately want to fly from XXX-Error City. When they get a miles quote for somewhere xxxx(x) miles from Error City they may well let someone know about it so they can try and make their redemption at the appropriate rate.
I guess throwaway cities are a different matter if that's what you mean?