Jamieson, Fausset and Brown on Ezekiel 16:31

31. Repetition of Eze 16:24.

not ... as ... harlot ... thou scornest hire--Unlike an ordinary harlot thou dost prostitute thy person gratis, merely to satisfy thy lust. Jerome translates, "Thou hast not been as a harlot in scorning (that is, who ordinarily scorns) a hire offered," in order to get a larger one: nay, thou hast offered hire thyself to thy lovers (Eze 16:33, 34). But these verses show English Version to be preferable, for they state that Israel prostituted herself, not merely for any small reward without demanding more, but for "no reward."