$1.99 one on healthy salty snacks took me into an immediate 25 minute Invoke session, completed it and at the end when is says "Thank you click here to continue" it takes me to this page:

Oops! The requested page does not exist.
Thank you for making time to participate today.
Unfortunately we are not able to redirect you back to your panel company due to technical problems.

Please contact your panel company regarding eligibility for a prize and provide the following details:
User ID = prs98445bfd7b874bf
Session ID = 984-op-015-010-01
Participation time = October 26, 2015, 5:56 PM
We apologize for the inconvenience.

and of course no credit REALLY Stinks