Admittedly, the OP is not very clear. There could be at least three questions, based on the headline, the body text question, and the example URLs cited:

(1) "Why are journals not open access?"

(2) "Where can I get free copies of academic articles?"

(3) "What open access journals/preprint servers exist?"

My response attempted to answer (1) and (2) with "most journals/conferences are ultimately not interested in dissemination of research results to the general public" and "Google Scholar, which generally has un-paywalled PDFs from academic web pages," respectively. Other people answer (3) elsewhere in this discussion, with answers like arXiv and PLoS.

If your point is that it is not yet clear economically how academic publishing will work in the future, then, I agree.