These are bonuses that you must make a deposit to claim. Casinos use match bonuses as Welcome bonuses or as recurring campaigns, in which they are commonly referred to as Reload bonuses.
When you make a qualifying deposit, you receive a percentage of your deposit in return as bonus credits.
For example, if you deposit R1,500 and claim a 100% bonus, you will receive R1,500 worth of bonus credits. These bonus credits are added to your bonus balance and become accessible once you have used all the money in your cash balance.
Deposit offers do not always comprise bonuses, as many casinos choose to offer free spins instead. Furthermore, casinos will often combine these two offers to create enticing welcome bonus packages.