Casinos use this to trap you in a vicious circle of addiction. They will give you loss-back/rake-back in the quantity, which might not have enough appeal for you to withdraw, especially after a big loss (which enabled that loss back). They will do this either by giving you your loss back or rake back in small installments (daily, weekly, or monthly) instead of giving you a lump sum amount one time. It is not that they cannot give you more, but they will deliberately do this because they want you to play with that amount and take bigger risks. After you lose that rake-back/loss-back, you will have an urge (twice as strong) to deposit and win back the lost amount (this is especially true if you are new to gambling), taking a higher risk to avoid the intra-confrontation with the fact that you have just lost x amount. The majority will lose again and again; some will even develop a defense mechanism to not even think about their big losses and continue focusing on depositing more money to cover losses.
This cognitive bias has some deep-rooted genesis in human psychology because of how we evolved. A shortage of food is more lethal than the happiness that comes with excessive food.
I am posting this because understanding this concept helps me become more responsible with my decision-making, and it might be helpful to you as well. I am eager to know opinions of other wise members.
People are inherently bad at calculating risks in general, we have a tendency to overestimate our predictive abilities and underestimate the chance of losing. It can also form part of the reason that people get so addicted to gambling - because they are angry at their poor decision making skills and keep attempting to punish the casino/bookmaker by thinking we can beat the odds. The reality is that the dispassionate computer processing algorithms and now AI are able to crunch a lot more numbers in order to make an assessment based on historical precedents, across many different data sets and probably using more recent data, will on average perform better than the often random guesses that gamblers make.