Affiliate programs usually rely on cookies, referral links, or user logins to connect a signup back to the original click. If the user switches devices before signing up, attribution may still work when email-based tracking or persistent identifiers are used, but it can also be lost if tracking is only browser-based. Overall, it depends on BMF.io's configuration and how robust their tracking system is across devices. Many modern affiliate platforms improve accuracy by using server-side tracking and consented user data to reduce missed commissions.