Field note
Why the first two weeks of installs so often arrive unattributed
Blank sources in week one are usually a naming problem, a timing problem, or a path nobody thought to write down — not a mysterious failure of measurement.
Launch morning is noisy. Someone is watching store rank, someone is refreshing ads, someone is answering a family chat. The first-open event is treated as a given. Then Friday arrives and a third of the installs have no source. The usual reaction is to blame a vendor. The usual cause is more ordinary.
Campaign names written in English for a Malay listing are one cause. The person placing ads used an internal code; the store listing used a different phrase; the creator used a third. Nothing joins. The install is real. The source is blank.
Timing is the second cause. A deferred deep link that works on a quiet Tuesday can fail when the store is slow on opening day. People wait, leave, return through a generic search, and land as organic. The paid click that started the story is gone.
The third cause is the path nobody wrote down. A booth at a polytechnic. A sticker on a drinks fridge. A mention on a lunch-time radio show in Johor. Those people did find the app. They did not pass through the campaign list, because the campaign list was a paid-media document.
Filling blanks after the fortnight is guesswork. Naming paths before opening day is slower and less dramatic. It is also the only way the second week’s spend has something honest to stand on.