The U.S. law that prevents U.S. investigative agencies from intercepting or reading email messages without first obtaining a warrant.

A law passed in 1986, ECPA (pronounced "ek-pah") is that law that allows Internet communications to be tapped into. Controversy: The law was originally promoted by privacy and civil rights [..]

Electronic Communications Privacy Act. A law which prohibits phone tapping, interception of e-mail, and other privacy violations except under special law enforcement situations usually requiring a war [..]

An online advertising pricing model used to calculate the effectiveness of advertising to instigate a specific action that is not a click (CPC) or install (CPI)

The effect of viral growth on the CPA. The eCPA is the real cost to acquire a new player. For a game to be a success the eCPA must be less than the LTV. In other words, the cost to get a new player into the game must be less than the player spends during their lifetime.

Effective Cost Per Action/Acquisition