I'm not quite sure what the inquiry is. If you have a free trial subscription to a channel, you will only have access to that free trial on Roku devices that are linked to the same Roku account. The free trial will not apply to a device on another Roku account.
With more information we will be able to assist you further.
Re: Watching Acorn Subscription on Another Roku/TV
I also signed up for Roku/Acorn and was wondering the same thing. How do I watch on my laptop or on one of the other Roku devices in my home. According to Danny's answer, it looks like you can't watch on another Roku device. This is all so confusing. I subscribed directly to Netflix and had no problems. I quit Netflix though because of dark programming and Cuties was the death knell. Other people are saying they have been unable to watch it through their Roku device, without paying a Roku subscription in addition to paying the Acorn subscription. Other people just got billed for both without any warning. I think probably this Roku/Acorn is no good and it is better to cancel it and subscribe directly to Acorn. I hope the handshaking on that is not messed up too.