Running Meta ads to affiliate offers breaks purchase tracking. A bridge page gives a proxy signal, not a closed loop. SubID revenue matching still decides spend.
Clicks still look fine but commissions fell? Name which two ledgers disagree first, then follow one known SubID through every hop from click to payout.
A practical 2026 tracking system you can audit: pick a source of truth, standardize UTMs vs SubIDs, plan for cookie loss, and use server-side/hybrid postbacks to reconcile GA4 with network payouts.
