If your points are truly earned - by helping to create the community, writing honest and well-written reviews then the item you get is not free. The time you spend and the value you add are sought by the maintainers of Eden - that's why they made the points program. The point rates are calculated so that they won't bankrupt the system unless people start trying to game it. But spam-for-points is quickly and efficiently dealt with here.
In my country there are sites that specialize in connecting people who write on forums for cash with commercial forum owners. I don't remember the rate paid but it's about what you get on Eden and it's not as open and straight-forward as it's here. I much rather do reviews and discuss things here, as me, honestly, than earn money-per-post pretending to be a 16 y.o. who's found the "best eye-shades ever". Even if I may make less from the mathematical point of view, for me it's more. And on top of that I get to choose from things that are very, very hard to get in my country.