Proxy Incompatibility with App Retargeting Pixels
When a pixel fires, it doesn’t just send “this user visited this app.” It sends a full context package: device identifiers, timestamps, headers, IP addresses, cookies, session continuity, TLS handshakes, and increasingly — proxy mismatch artifacts. The “pixel” is shorthand for a pipeline that logs the request, enriches it with metadata, and binds it to a user graph that spans dozens of apps and hundreds of sessions.