What does "sub" mean on ifunny?

[OuranAnimeGirl]

When I look on some pictures on ifunny, everyone comments sub. What does that mean?

[Jayden]

they like the pic or the persons profile so they sub it meaing Subscribe

[?]

It means that they are leaving a comment on a picture of the member that uploaded it to come back to their profile. People do this because Ifunny does not have a subscriber button yet, so they comment on a picture and can later check that person's profile on the "comment" section in the home page.

[Darryl]

Also posting a pic without leaving a name or tagging/hashtag. Example posting a pic of a pretty girl and not identifying her.