The adjust bid rule allows you to adjust the bid values of bidders on specific lots as appropriate. Bids can be adjusted by an exact amount, or proportionally.
A positive number will increase their bid and negative numbers will decrease their bid. By default lower values are considered better, but this may be changed by applying a different "Cost calculation" rule.
In the example below we are applying a 5% penalty to two bidders which we consider unreliable.
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