Used to work for the mentioned firm, albeit 20 years ago now.
Seems to have changed a lot but we used to have some excellent marks for these markets due to who used to bet with us (players, agents etc...), Plenty of decent info. Now they are more for PR and getting new accounts opened I always think, expect there is a liability limit of under £500 on most, even less for new accounts.
I actually miss the job at times like this as I could enter any name and get people talking, twitter would go wild if I stuck "Dyche 1/5" in for example!