The magnitude matters. Meaning journalists have an incentive to stretch the truth in either direction, as long as it'll get a reaction. A journalist now has to weigh this monetary incentive against their other incentives for being non-hyperbolic, truthful journalists.
The business insider article linked above makes it sound like a relatively nuanced measure. If the article makes a big splash but then gets wiped away by follow-up reporting, it doesn't sound like it gets rewarded.
Think about articles that don't move the market: did they contain novel, important information? If so, why didn't the market move?
It seems like this incentive encourages prioritizing stories which are unreported and meaningful.
The magnitude matters. Meaning journalists have an incentive to stretch the truth in either direction, as long as it'll get a reaction. A journalist now has to weigh this monetary incentive against their other incentives for being non-hyperbolic, truthful journalists.