I'm having the same problem, I get regular junk mail from them, not sure if I've tried unsubscribing from their emails, spam, spam, don't need it anyway but I think they operate a ratings service which targets specific races at courses where they know their horses do well...

What I know for sure though, they're vastly over-priced....

Actually, I kept a recent one about Cheltenham, I'll try & have a look at it -

Have you tried replying with Unsubscribe - I just did?