Patience's comment is flawed IMO.
Why?
Because these players know that they don't have to live with the consequences of their choices. Yes, they will spend real money (which clearly I didn't expect until Patience said that), however that in now way logically leads to a valid idea as to their views on their purchases. They can buy anything and know that they'll get their points back even if their choice turns out to be a lemon.
I suspect real F2P players won't get a 'money back guarantee' like that, so human nature tells you that they'll view things a lot differently than they would if they were free to change their mind without consequences.
Yes but what they spend money ON doesn't matter, they'll get credited back, which is the point, there's no consequences to their poor decisions so they'll not be too bothered about making a mistake!
It's a fact of modern life, best seen in lawsuit-happy America, people don't accept the consequences of their actions and usually look to blame someone else. In this test Turbine are shielding them from the results of poor decision making and so the decisions themselves will be of dubious value to anyone looking to obtain value judgments from the testing population.