**bleep**ing assholes with a thick accent tellING me the roku i bought can't be used becAUSE i HAVE TWO ALREADY AND THIS ONE for my third tv, will never work so basically defrauded me out forty bucks. doesn't say anything about a limit on the box. Is this fraud or just a big **bleep** you to your customers???
You can have as many as you want.
However, if you call a scammer on the phone, he'll tell you all kinds of nonsense to try to scam you out of some money. Just set your Roku up the usual way. If any website you go to tells you to call some number, don't. That means you went to the wrong website. Be CAREFUL entering the link URL.