A 'singular' flood of screenshot submissions is an irritating 'chore' to deal with.
When one individual is merrily submitting 50% of the screenshot uploads he is monopolizing the moderators' time with what is 'supposed' to be of curiosity value.
Screenshots are to display skinners' works-in-progress, or a user's current selection of others' works.
Both uses benefit from added descriptions of the displayed skins, etc.
If people validated their screenshot uploads with details as to why it was chosen as an upload then there'd be more sense to them  [and probably would stem such a flood somewhat].
Spare a thought for the admins....surely one screenshot upload every other day is more than enough....