@Linkat,
Looking at this closer I get the trees for free and if I am one of the first 50 to respond I get the kindle - other than that I need to donate to get the other stuff.
Looks like a ploy to raise funds. Not a bad one as the survey questions are kind of dumb - other than the one asking how many trees I have on my property - but if it was legit on wanting a true survey of trees - I would have thought it would be a bit deeper - like size, type of tree, etc.
More weird questions like
have you ever climbed a tree
as a child did play under trees
collect leaves, acorns, etc
relax under the shade
then there were a few that might be real - what is important function of a tree to you, and how important varies things are in relation to trees, like rain forests, etc.