The Betfred rep has indeed clarified the general questions. They finally "woke up and smelled the coffee" on this, unfortunately, many players had risen earlier, drunk their coffee, and had gotten stuck in.
The "abuse" is not really against the rules, it's just that Betfred underestimated the tenacity of players to sit in front of their PC for hours on end playing Blackjack as fast as possible. If you have a teenager who is "hooked" on their gaming console, you will quickly realise just how LONG a human can spend on a single minded and repetitive activity. Teenagers are not even playing for 30K, just imagine what would happen if they were
The risk is obvious, pretty much EVERY determined player would be walking away with a Jag or 30K by the end of the month. It would be near impossible to pick out the superhuman determination from the lazy bot user.
This is one example where a Blackjack bot would afford a HUGE advantage to the player, making damn good odds become a certainty if the bot ran 24/7 for most of the month.
A better way to have run this would have been to place a limit on the number of Jags available, with them being given out on a first past the post basis. They could further have split this limit into weekly sections so that the promotion generated interest for much of the month, no matter how many hands were played.
The risk estimation could have been simple, based on the 1 in 80000 chance of receiving this hand. The expected number of Jags awarded would be around <total hands played>/80000
Is it any wonder that as soon as this promotion was launched it produced a deluge of participants and a swifter than anticipated exodus of Jags.