I know that I'm a little late to the party, but I noticed that the Doctor Who GIF
Quote:

Frank
*Doctor Who is not a hint. I just happen to enjoy the show.
[Please don’t take my saying Doctor Who is not a hint to mean it really is a hint. It’s really not a hint]
[[Please don’t take my saying Doctor Who really is not a hint to mean it really really is a hint. It’s really really not a hint]]
[[[etc]]]
|
is titled "
333.gif". A cursory reverse image search does not return GIFs with the same title, so one could argue that "333" is deliberate.
In regard to the "Doctor Who is not a hint" stuff: The
subject of Doctor Who is not a hint, but the
GIF(and/or its title) could be.
Perhaps 333 only refers to the 3 sets of numbers or the 3 associated sports, but it could also be a teaser or something else.
Anyway, this is something that I haven't seen mentioned in this thread yet.