Yes used is written correctly and its meaning is: exploited, das (Plural of exploited ). People who take the benefit of any thing or situation, that take advantage of everything. We must remember that this word is a masculine and feminine adjective.
exploited is incorrectly written and it should be written as "Aprovechadores" being its meaning: Opportunistic. And scoundrels. (Profiteers. ) That they go through life advancing leaning on others, for these beings importantly is reach a goal. In addition to lacking scruples
Plural of exploited, gives adj. To take advantage of everything. Applied, diligent. adj. and s. That removed benefit of favorable circumstances, unscrupulous and thinking only of your interest.