Dear Kevin,
To allow 2 Roku at the same house, all you need to do is let us know the sub-account name (another e-mail address of yours) and we will create the account for you. From there, you can sign in to the sub-account and set up the 2nd Roku, just like how you link the 1st one with the sub-account.
As subscriber, you can have as many devices as you wish in the same house.
Please do note that, the policy is same as cable TV - you will need to use the devices at the same household. Also, due the nature of Internet, when you have multiple viewing sessions concurrently, the signal quality might be degraded, even produce lagging and unwatchable. Therefore it is our policy to disallow more than one viewing session at the same time.
Thanks for your understanding and support,
Amy Lam
5ik.TV