In most cases yes, peer reviewers are not paid. These companies are pretty much a paywalled pdf hosting service hence the outrage against them.
The most I've personally gotten was a nice note from an editor; I've heard rumors of someone who reviewed enough to get some journal-branded swag (a mug or calendar, I think). If you review a book, you might get to keep the copy.
Nobody gets cash.
That is, in fairness, three instances over what is by now probably well over 100 reviews.