The release of prisoners was used as a bargaining chip.

释放战俘被用作讨价还价的筹码。

《牛津词典》

Use information as a bargaining chip too.

将情报也用作讨价还价的筹码。

youdao

Zintan's fighters have so far declined to turn the captured Saif al-Islam over to the central authorities and may be using him as a bargaining chip.

津坦的武装人员至今依然拒绝把被捕的赛义夫移交给中央政府，还可能把他作为交易的筹码。

youdao

The full faith and credit of the United States of America is not a bargaining chip.

WHITEHOUSE: President Obama Holds a News Conference

The advocates of using the debt ceiling as a bargaining chip have no leverage.

FORBES: The Debt Ceiling Debate: My Two Cents Worth

You can always offer one later as a bargaining chip as you negotiate price and possible repairs.

WSJ: Is a Home Warranty Necessary in a Hot Market?--WSJ House Talk