User blog comment:DeTurbanator/Did Activision lie about the early access to BO3 Beta?/@comment-1263839-20150901063645

On the Xbox One at least, the pre-orders got the beta first, then on the 28th (the Friday) it was available for all on the platform.

Of course, the pre-orderers were given multiple codes. My friend gave me one of his spares so I got on despite not pre-ordering.