High-roller bonuses work with the same principle as regular online casino bonuses in most cases. After making a deposit and claiming the bonus, you’ll get a match bonus calculated as a percentage of your deposit. For example, if you deposit €500 and get a match bonus of 200%, you’ll receive another €1000 on top of your deposit.
The main difference between regular bonuses and high-roller bonuses is that, usually, the latter come with higher percentages and maximum bonus amount limits. In Guinea, the biggest high-roller bonus may go up to €500, and the highest percentage can be as high as 300%.