[alexander13]

Free has the nasty perception in our minds of being worthless. We've all heard the saying "you get what you pay for".

That is in the subconscious and so the 30dc being free your brain naturally says "I get what I pay for. I paid nothing for this, therefore it must be worth nothing."

Which is completely untrue in this case and in many other cases on the net.

There are many garbage pdfs and free 'training' out there. No question.

But free things can have value and 30dc is an excellent example of this.

As Carmen said of even more value is the community and contacts you make during the challenge.