Some falsefully speculates that they won just because they want to pave an ease to those who has been advising them to quit or limits gambling simply because the gambler has been unlucky to win instead he keep betting over and over without a good bankroll management in their gambling carriers.
They basically do this because they feels disturbed and inconveniences of the people's opinions and advices towards the gamblers unprofitable gambling experiences
They have to justify their losses and they have to feed their ego that they are doing good when they are incurring losses, I once did this because my friends kept taunting me to show my winnings because I played every day and I kept my results all by myself, so I have to manipulate or show fake screenshots but I learned my lesson that I should not fake it and manipulate, I feel guilty because I was fooling myself more than other people.
So from then on, I kept everything to myself and I was never tempted to show my winnings you'll have peace of mind not fooling yourself and other people.