Just to add for those interested in these things (aren't we all?) - this represents pretty poor value for any effort.

From recollection, the average 500 point survey claims it that it takes 20 minutes to complete.

If a decent IC takes 40k points then as each e-rewards earnings of 3000 points (6 surveys taking 2hrs) translates into 1000 PC points, then it would take approximately 80 hours of survey completions to get 1 night.

There is an option to transfer 10k e-rewards points to 4k PC points but as points expire and the majority of participants would be unlikely to amass 10k e-reward points before they expire, I guess for most it's 80hrs surveys for 24 hours room occupation. Obviously a 30k room would take just 60 hours ........