That idea matches up with what others who had some insight into the attack have told Ars confidentially—that it was also pointed at Sony’s Play Station Network, which uses Dyn as a name service provider.
For now, it's not clear that the attacks on Dyn and the Play Station Network were connected.
Mirai is hardly the first Io T botnet to make headlines.
"This could mean that they are 'renting' several different botnets to launch an attack against a specific victim, in which multiple other sites have been impacted." The motive may have been blackmail, with the attacker seeking a payout by Dyn to stop.