There is no restriction of where the testers' results can be posted: Instagram, Facebook, their own blogs, websites, other photography-related websites...especially Kodak! The pics will come, just give them plenty of time. They have to find a place for E6 processing and then go through the vetting. There are a few testers on Photo.net, and likely PetaPixel will corral somebody too.
Instagram photos viewed on mobile phones are usually garishly highly saturated. It is best to view Instagram on a PC
[ instagram.com] for a more realistic, but still somewhat quite detached (and always square) representation of images, and even then, there will be a vast variety of hits and misses reflecting the experience of individual testers. Portraiture, landscape, sports, pets/animals and sports, among many others will all be offering something.