Two ways these categories pay
A dealer can pay a flat sponsorship, a fixed fee per introduction, or a written finder's fee when a watch, a jewel, or a work actually sells. None of that requires Vinto to be a dealer. It does require the partner who sells the object to be the one allowed to sell it.
An affiliate program, Chrono24 or 1stDibs or a specialist, pays a commission when a labeled link produces a purchase. Those links stay off until a tracking ID is in the environment. A button that is not an affiliate link is not dressed up as one.
Box and papers are not a guarantee
A reference number and a year tell you which model the seller claims. They do not prove the watch in the photo is that watch, and Vinto does not host the seller's photo in any case. Authentication, service history, and whether the piece is stolen property are questions for the dealer and, when the money is serious, for a specialist you pay.
Art has the same shape
Title, condition, and provenance live with the gallery or the auction house. A finder's agreement should say who invoices the client. It should not say Vinto represents the buyer in the bidding.