Synonyms of 'trade on something'
▷ See trade
He was a man who traded on the achievements of others.
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The opposition are exploiting the situation to their advantage.
If you say that someone milks something, you mean that they get as much benefit or profit as they can from it, without caring about the effects this has on other people.
A few people tried to milk the insurance companies.
If you say that someone uses people, you disapprove of them because they make others do things for them in order to benefit or gain some advantage from it, and not because they care about the other people.
Be careful she's not just using you.
Thesaurus for trade on something from the Collins English Thesaurus