They liked the effect this contest had so much, they started a new one:
Login ? Instagram and
Terms and Conditions
Same price (navy blue KP), same conditions as before as far as I can see: share single images taken with eligible lenses and include the hashtags for the lens and #PENTAX_Autumn
You can submit images until 22nd of November.
On an unrelated note: Instagram now allows uploading photos directly from a browser on desktop computers, no app, workaround or third party software needed anymore.