DirectBet doesn't want to be on this service because their odds aren't competitive.
The first part is fact; the second is nothing more than speculation.
I run a web business (nothing to do with gambling). I wouldn't let comparison sites scrape my site either, as I don't think there is any real benefit to being on a site like that, having you chewing up my bandwidth and sending me the worst quality of customers.
Rampage - I don't want to keep picking on DirectBet but I pay $375/month for a line service and can see the lines live without any delay from many books. DirectBet's odds aren't worth playing at.