Winning come up first since that actually give an idea to those gambler which experience addiction that there's easy money in gambling. That's the reason why most of the people got hook with it. Later on losing would also challenge them since they would think that they can win on their next bet especially if they are losing to much.
Yeah, a good strategy from the casino, allowing that so-called beginners luck and let the gambler feels that they've got an advantage making some easy money out from luck, or coming from the strategy that they are following, unknowingly that they are being read by the programs that being setup to learn their behaviors.
The urge to recover their losses will make them want to gamble for more but usually those people who chase their loss will end up in more miserable situation that's why we see a lot of them got broke and do crazy things just to get a budget just to have funding's then continue what they are doing.
Each winning and losing situation is factor why people became an addict and its not all about winning.
This act is how the addicted part start to increase, that urge of keep playing and the desire to bet more to try recovering what they've already loss, things will be worsen with the way gamblers react from each outcome that they've got, either they win or lose the lust of keep pushing brings them deeper to gambling.