Agreed, their form is way too long. They do not need all this info up front, and would certainly increase registration if they shortened it. That being said,

Agreed, their form is way too long. They do not need all this info up front, and would certainly increase registration if they shortened it. That being said, now looking at the form, there is another emotional incentive to finish (without knowing what it is): chance of getting money. The one message they convey with this is that you may make money off of it. As Charlie Munger has pointed out (http://vinvesting.com/docs/munger/human_misjudgement.html http://vinvesting.com/docs/munger/human_misjudgement.html), when you start combining multiple strong emotional drivers, you can get some startling results. In any case, I don't think it would be a tiny, tiny proportion. You are making assumptions about the average person based on your beliefs. Again, only empirical results would be useful here. Every case is different.