The problem with most promo codes is that they don’t last forever. But to enjoy the treasure (bonus), you must first possess the key (code) and make sure that you found it ‘on time’. It’s like the key that opens the treasure chest.
RELOAD50, which may refer to a 50% reload offer).
They usually consist of a word or one word followed by a numeric value (e.g. A casino promo code is a text sequence used to enable a promotion.