When you eagerly claim a massive casino bonus, the required playthrough or wagering requirement is usually heavily advertised.

Because different games have vastly different house edges, the casino assigns a specific "contribution percentage" to each game category.
Why Casinos Want You to Play Slots
In almost every single online casino, standard video slot machines contribute exactly 100% toward your wagering requirements.

By offering a 100% contribution rate, they actively push bonus users away from the more player-friendly table games.
Always read the "restricted games list" before spinning with bonus fundsClassic 3-reel slots sometimes have a lower contribution rate than modern video slotsProgressive jackpot slots are almost universally excluded from bonus play entirely The Mathematical Penalty on Skill Games
Because these games feature an incredibly low house edge (often under 1%), casinos heavily penalize them regarding bonus contributions.

This means you would have to wager ten times the normal amount just to clear the exact same bonus.
Protecting Your Bonus Funds
Before you ever deposit money to claim an offer, you must relentlessly hunt down the casino's specific bonus Terms and Conditions.

Furthermore, if you accidentally play a restricted 0% game with active bonus funds, the casino may confiscate your entire balance.
Game CategoryTypical Contribution %Speed of ClearingVideo Slots100%Very FastBlackjack5% - 10%Agonizingly Slow
Never assume a game counts; always check the specific terms and conditions table before placing your first bonus wager.