The best online casinos for real money offer bonuses allowing you to play games and potentially win real money without using your deposited funds. These bonuses come in the form of virtual bonus currency that the casino pads or replaces your cash with. However, bonuses are subject to terms and conditions to prevent players from taking advantage of them.
Regarding online blackjack, welcome bonuses are rarely blackjack-specific but may include free chips or bonus cash in the form of deposit matches or no deposit bonuses.
Deposit matches match the cash you deposit into the casino, usually at a rate of 100%, up to a specific limit. No deposit options are generally smaller, usually from $10 to $30.
An excellent online blackjack bonus should have a reasonable amount of money, low wagering requirements (15x or less), a high wagering requirement contribution rate (>10%), and a reasonable expiration date (30+ days are best; 14 is okay).
However, remember that card and table games like blackjack typically have lower contribution rates to wagering requirements than games like slots. Some casinos may allow you to increase the contribution rate for blackjack to 25% or more.
Existing player promotions and blackjack tournaments may also pop up occasionally, but they are rare. When looking for a blackjack bonus, ensure it is available on live blackjack and meets the abovementioned criteria.