This sequence of keystrokes was improbable, and so the problem did not occur very often and went unnoticed for a long time.

Because of an overwhelming variety of products and services on the market, those that stand out in some manner are better noticed by consumers.

Passive data, as the name suggests, are not generated consciously they are by products of our everyday technological existence. As a result, this information and its intrinsic monetary value often goes unnoticed by Internet users.