Saw your edit right now.
Sorry for this "stupid" answer. But try to log in and out from Kickstarter. Ohh and also make sure that you don't have an ad-blocker turned on that might remove the survey link.
It looks something like this (old version of Kickstarter)
Edit: Ohh and btw, I'm not affiliated with Pimax or Kickstarter, only a community member trying to help out.