PokerStars was originally a Costa Rican company, Rational Enterprises, part of Canadian company The Stars Group which was majority owned by the Canadian Scheinberg family. The company was subsequently moved to Onchan, Isle of Man.
In many card games though, the spades are the highest ranking suit. And therefore the Ace of spades is the highest ranking card out of the 52 standard ones in the deck.
These are split into four types, known as suits, called hearts, clubs, diamonds and spades. There are numbers on the cards, and there is one card of each number in each suit.