These are combos of numbers and letters that are given by a casino's affiliate sites to show that a user has satisfied reward terms. Users enter them on the casino site to claim bonus bets and spins. This means that they can get to play some casino titles without using their own money.
The Central American country, known as Costa Rica, is rugged and covered in rainforest. It has coastlines along both the Pacific and the Caribbean. Costa Rica is well known for its biodiversity and wildlife. The country has been an online gambling hub since the 1990s and has one of the largest concentrations of mobile online gambling providers.