Pretty much every game that involves micro-transactions has a large amount of their micro-transaction revenue coming from a very small percentage of their players, the so-called "whales" that spend hundreds or even thousands of dollars per month on them. I've also sometimes heard gamers that spend lower amounts of money as "dolphins".
Why are these players called whales and dolphins? Does it have to do with the whale hunting or something?
Best Answer
The term "Whale" is borrowed from the casino industry, where it is used to describe a rich gambler who bets extraordinarily large amounts of money. Just like in the game industry, casinos want to "catch" the most high-betting whales, because they provide a lot of income for comparably little expense. Casinos often go out of their way to form personal connections with whales and provide them with personalized service to ensure their loyalty and make sure they lose their money in their casinos and not those owned by the competition. Some game companies in the microtransaction business are also known to do this.
The casinos, in turn, took the term from the Poker community which has a tradition of using fish-themed terms for different categories of players, like "fish" for weak players and "shark" for strong players who prey on the "fish" in order to take their money. A "whale" is what every "shark" hopes to find: a very large fish* who has a lot of money and likes to play high-stakes games despite not being skilled enough to compete in them.
*Yes, I know that whales are mammals and not fish.