How do you keep track of the completionists? Also, when you say 'submit your story to us on Tumblr to be reblogged,' do you mean tag the archive account's username or the event's tag in the post tags section?
1) We will post a form to fill out at the end of the months to get a list of completionists.
2) You have several ways of posting your works and possibly end up on the blog. You can a) post them on Tumblr and use our tagging system (#taaagggss). This is our preferred way. b) You can submit works/links to the @whumptober-archive blog if you add tags and trigger warnings (like an ask, just a submission) c) you can tag @whumptober-archive (like this) in the post you made.
We prefer if you make your own posts and use the tags we provided (so 2a) :)