[Tottanka]

I think a reliable way to find if the intention of the game hint is this or the other, a good way would be to "backtrack".
Meaning, if you are confident enough that you solved it - show us how the GDC decided on it to be the hint.
Example: The weight limit change theory, show us how the GDC wanted to tell us that the limit has been reduced, and thus how they found that sign and its coordinates.
If someone could both give a solid theory for a hint, and provide a backtrack of that kind- i think it would be pretty solid for a solution.