Job scams follow a consistent template across markets: a fake vacancy is posted, applicants are asked to pay a "processing" or "training" fee to secure the position, and the job never materialises. Job boards that don't specifically design against this pattern become unwitting hosts for it, no matter how good their listing-quality moderation otherwise is.
Zuma Jobs simply doesn't support any payment flow between an applicant and an employer at any stage of the hiring process — there is no "application fee" transaction type in the system at all. Employers are verified as legitimate businesses before they can post, and the platform's role ends at connecting applicant and employer; it never sits in the middle of a payment between them for this specific relationship.
Sometimes the most effective anti-fraud design isn't a detection system at all — it's removing the transaction type that fraud depends on from the product's technical vocabulary entirely, so the scam simply has no rail to run on. That's a cheaper and more reliable defence than trying to detect fraudulent postings after the fact.