[Calloutman]

You're still providing a valuable service for free. Why can't everyone get paid?

[mschuster91]

Reviewers are getting paid from the university, as are the paper authors. The problem is that the journals exploit the taxpayers and grant providers.

[chdlr]

I would disagree for the first part: Review usually does not happen during paid hours or is even somehow formally accredited by universities.

[jbay808]

Not all reviewers even work for universities. Some of us are in industry, and our companies certainly don't pay us to anonymously review scientific papers.