Engine
Nearby signals should be useful, fresh, and limited.
DOS is designed to reduce noisy matches by considering distance, recency, user visibility, activity heartbeat, and cooldown behavior.
DistanceNearby first
Profiles closer to the selected radius are prioritized.
FreshnessRecent signals
Stale locations should not dominate nearby discovery.
VisibilityUser controlled
If visibility is off, the user should not appear.
CooldownAnti-spam
Notifications should not repeat aggressively.