The Apple ][ hackers were born out of a software industry which made it almost impossible to copy a software package, even for the purpose of having archival backups. Most companies also only sent one disk out with the package. There were a few exceptions to this rule but with the popularity of the Apple ][ computers among teens of the time, it meant that there was an entire force of young talent with time to burn. And burn they did, all so brightly, cracking every known scheme produced.
Source: Apple ][ Hackers (2009?).