Cross-Device Tracking

Players research bonuses on their phone in the evening and register on a laptop the next day. Without cross-device linkage, that journey looks like an untracked direct registration — and an affiliate goes unpaid.

How it’s actually solved

Deterministic matching wins: the registration event itself (email, player ID) becomes the join key once the player converts, letting the platform look back at which click preceded it. Probabilistic device graphs exist but are overkill for most programs. The practical fix is unglamorous — persist click IDs long enough server-side that the deterministic match has something to find.