I was just looking at the top performers page and I noticed that I have been credited with 1 in the Jokes column.
I have not submitted any jokes to this site.
I did post a comment on one of them during the last few weeks so I think that it is including that.
I think this is an unintentional feature as when I look at my profile it says Jokes (0).
To my mind it doesn't make sense for me to get "points" for commenting on jokes as I haven't really contributed anything valuable to the section.