Game Weighting Percentages
Each category of games will have a game weighting percentage. If, for instance, the game weighting percentage of Blackjack is 50%, it means that only 50% of any bet you make on a Blackjack game will be counted in favor of completion of pending wagering requirements.
Usually, games that have a higher house edge will also have a higher weighting percentage. This is why video slots tend to have 100% weightage. This way, casinos can encourage you to play games which are conducive to their profits.