You are right about incentive. But I always thought that the labeling and mechanism was wrong to start with. There should be a log for success that can be copy and pasted (if appropriate) to the log, and a fail message that includes help for the person to identify what is needed to progress the challenge. Relabeling the first field would go a long way to addressing that. (eg to "Qualifying details:")
And yes, a copy button would help with that.
Many scripts do a poor job of this, putting the qualifying details into the HTML output instead, where it is hard to copy and paste the results. But changing the field name (and having the copy button) would encourage script writers to prduce better qualifying result details.