Sorry, I need more information.

Please make sure that your browser is fully updated, you have javascript turned on and you may want to disable add-ons/extensions. You could also try it from another computer or browser. The uploader seems to be working normally from this end. 

Next time you come across one, can you please send a screenshot of the page you found it on (including the ad) to support@imgur.com? Thanks! 

Not sure about this. We don't do any automatic uploads.