If you read the t&c’s it mentions Founders Card. I imagine that they just cut and paste from there. Also it refers to Hilton Diamond Elite and, of course, there is no Diamond Elite. Finally, they ask for a payment of 40gbp (or so) to get the free trial which is refunded as a “loyalty” bonus after 3 months. Why do they need to reward my loyalty for not canceling something free.

I’m going to say it is a scam.