[k__]

Probably a plausible deniability issue.

If you wouldn't prohibit piracy, it would become normal and the people who could pay stop paying too.

[unaindz]

In Spain is legal to download and share but people often pay for it anyway.

As Gabe Newell said the best way to combat video game piracy is by offering consumers better service than what they might receive from pirates. Piracy is not a pricing issue, but rather a service problem.