[fidotron]

One of the first bits of analytics I put on any webserver is to count all unhandled urls. As others here say things like WordPress admin page request probing are classic but I remember one of the Django designers pointing out that sometimes legitimate looking requests are actually a form of suggestion. That used to be a lot more true when people would try to play with urls to get to what they wanted.

Relatedly if you work in a field where your products become known as a useful benchmark you will find prototypes start showing up long before any public disclosure. We used to use this to be able to anticipate new screen resolutions and evaluate new GPUs and SoCs before being told about them.