There would appear to me to be an excellent opportunity albeit with a few hurdles for some of the more popular streamers to set the wheels in motion to market to US customers.
The current subscriber base for the US focused streamers is gargantuan in comparison to the UK and the quality of the streams is mind numbingly bad.
When this market really opens up the rewards will be huge and the volume would be such that the halcyon days of superb affiliate income earned by the likes of bandit would be increased tenfold for the winning streamers.
just have a look at the dross the yanks get fed just now and think how much a streamer with good content would stand out.