Since WGT changed to In.Brain to control their 'Earn Free Credits' opportunity, nothing has worked well. Just tried to take two surveys and neither loaded. Also, when you select one to take, the amount of time the survey will take and the credits earned change almost too fast to see just before the survey attempts to load. Plus, I have yet to see a video to watch since they've been involved.
For those of us that don't have a lot of excess cash to spend on this very expensive game, this was one of the few ways we are able to survive to play another round.