All the available bonuses that online casinos offer

The most of online casinos offer sign-up bonuses to new players making their first deposit, and often on subsequent play as well. 

Casinos may choose to restrict certain games from fulfilling the wagering requirements, either to restrict players from playing low-edge games or to restrict 'risk-free' play (betting for instance both red and black on roulette), thereby completing the wagering requirement with a guaranteed profit after the bonus is taken into account. 
 

Welcome bonuses 

The Welcome bonus is a deposit match bonus on the first deposit ever made in the casino or casino group. Welcome bonuses sometimes come in packages and may be given to match the first two or three deposits (First Deposit Welcome Bonus, Second Deposit Welcome Bonus, etc.). They can also be tied to specific games, such as the Welcome Slots Bonus or the Welcome Table Games Bonus. The casino may also offer Welcome bonuses for high rollers who make an initial deposit above the standard amount limit.
 

Referral bonuses 

There are two types of referral bonuses: one for the Referee and one for the Referrer. The Referee gets a bonus when he or she registers an account at the casino and mentions the Referrer. The Referrer gets a bonus when the Referee completes all the requirements, such as making the deposit and wagering it a certain number of times.
 

Cashback or insurance bonuses 

Cashback or insurance bonuses are offered as a percentage of all losses in the player’s previous gaming activity. Typically, only deposits that were not matched with bonuses count towards this bonus. You can additionally find websites that offer casino cashback payments based your losses encountered while playing with one or more online casinos. Those type of cashback deals are usually paid back to players by the casino portal that offers those special cashback offers. 
 

No deposit bonuses

The most popular form of bonus is one that can be claimed without the need to deposit any of the player's own money - known as a no deposit bonus. These bonuses are used as acquisition tools by casinos wishing to attract new players. No deposit bonuses don't always take the form of real cash, as exemplified below.
 

Non-cashable bonuses 

Non-cashable bonuses may be called "sticky" or "phantom" bonuses. In both cases, the bonus forms a part of the player's balance, but cannot be cashed out. The difference comes at cashout time. A phantom bonus disappears when the player cashes out, while the sticky bonus 'sticks' to the player's account until it is lost. 
 

Comp points 

Comps are commonly available at land-based casinos, but also exist online. Comp points can usually be exchanged for cash, or other prizes (e.g. gadgets, souvenirs, tickets for several events). The amount of cash given per wager is usually very small and often varies with game selection. A casino might offer three comp points for each $10 wagered on slots and one comp point for each $10 wagered on blackjack. The casino might give $1 for each 100 comp points. This example is equivalent to returning 0.3% of wagers on slots and 0.1% of wagers on blackjack.
 

Bonus hunting 

Bonus hunting (also known as bonus bagging or bonus whoring) is a type of advantage gambling, where turning a profit from casino, sportsbook and poker room bonus situations is mathematically possible. For example, the house edge in blackjack is roughly 0.5%. If a player is offered a $100 cashable bonus requiring $5000 in wagering on blackjack with a house edge of 0.5%, the expected loss is $25. Therefore, the player has an expected gain of $75 after claiming the $100 bonus.