Perhaps many hosts have the same security issue, but they haven't been targeted due to having less bitcoins. I suspect instead the Linode incident was an inside

Perhaps many hosts have the same security issue, but they haven't been targeted due to having less bitcoins. I suspect instead the Linode incident was an inside job, in which case it could happen anywhere regardless of security. Still, Linode should provide more info about what they did if anything to fix it.