The bookies put a bit of software on your computer called "Iesnare" which lets bookies see what other sites you are using (for example Smarkets,Matchbook.. so they can easily see if you are a "bonus abuser" and if you are betting and laying and of course gub you... It is fairly easy to remove the bookies tracking software a very helpful guide posted on Bank Of Bets at https://www.bankofbets.com/training/how-to-block-iesnare?awt_l=6AZ7.&awt_m=ikvhkryoaBsrCFU