Fortnite maker Epic Games is going to reward creators if players spend V-bucks before or after visiting that creator’s custom-made Fortnite experience. The change is happening as part of an update announced Wednesday to the engagement-based formula Epic uses to pay Fortnite creators.

Here is the specific language about the new metric, from Fortnite’s blog post:

Effective November 1, we are introducing a new metric to the engagement payout formula that rewards creators when individual players spend V-Bucks in Fortnite before or after engaging with their island.

So, as an example, if you buy the forthcoming Alan Wake outfit right before jumping into Epic’s Alan Wake-themed Fortnite experience, it seems as if that purchase would contribute to Epic’s payouts it receives as part of the Creator Economy 2.0 program.

Epic’s description doesn’t specify how much time a player has to spend money before or after visiting an island (Epic’s term for a creator’s experience) for it to count toward a creator’s payouts, and I’ve asked the company if it can clarify. But in the blog post, Epic says that the new V-bucks spent metric “enables us to more accurately recognize a creator’s impact on the shared engagement payout pool and the overall growth of the Fortnite economy.”

The new metric goes into effect on November 1st (which just so happens to be a few days after V-bucks get more expensive), and the first payouts that account for it will be sent on December 30th. “Overall, we find that players who are having fun in Fortnite are most likely to spend in Fortnite,” Epic said. “So, for creators, making fun and engaging experiences is the most important driver of long-term creator success.”

The new metric follows Fortnite’s recent UI revamp that pushes creator-made maps with a YouTube-like redesign. In an employee email about the recent layoffs at Epic, CEO Tim Sweeney detailed how the focus on Fortnite creators has changed the economics of its business. While he says Fortnite is growing again, that growth “is driven primarily by creator content with significant revenue sharing,” which he said is “a lower margin business than we had when Fortnite Battle Royale took off and began funding our expansion.” He also noted that time in third-party Fortnite experiences now exceeds time in first-party experiences.

Fortnite is in the midst of its annual Halloween event, and Epic is planning to sell in-game outfits based on spooky characters like Alan Wake, Michael Myers, and Jack Skellington ahead of the holiday.