The score drops when a brand's campaign is left hanging:
Being removed from a campaign with zero posts delivered ("ghosting"): -15.
Going inactive on active deals: -2 after 7 days, -5 after 14, -10 after 30 days dormant.
Letting a deal invite sit unanswered for 72+ hours: -1.
Finishing in the bottom 25% of a campaign: -2.
What does not hurt your score: a brand rejecting a video, requesting a revision, or a campaign being cancelled by the brand. Those are normal parts of the process and are never counted against you.