The domain name 'dealsviews.co.uk' is owned by the same person/ company as 'dealsviews.com'. (The owner is actually listed as 'Chris Ryan' for the .com address and 'RNC Ltd' for the .co.uk one but the postal address for both is 371 Beach Road 03-29, Singapore).
There's an example of one of their emails here:
https://www.amazon.co.uk/gp/forum/cd/discussion.html?cdForum=FxX896DL34ZBBE&cdPage=44&cdSort=newest&cdThread=Tx19TM9X9TM8FEN
You'll see that it's on a thread entitled 'Chinese friends', with well over 1000 posts. If you click 'oldest first' you'll be able to see where the thread started but I've not read through enough of the posts to work out whether there's actually any point to signing up to these type of schemes.
However given that the servers for both of their web addresses currently aren't responding, it all seems a bit 'iffy' to me.