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No, Global Currency Exception refers to an area where your global currency is no use. The premium currency is more like a second global currency, which is bought with real money (and sometimes gotten in other ways, but always bought for real money), for pay to play items.
"We can handle what is true, for we are already living it."Sounds like Global Currency. That's one money type or monetary system that is accepted everywhere.
EDIT: Nevermind. Realized you meant something else. I don't think I've seen it anywhere outside of Facebook/Zynga games, so it might not have a trope yet. Not entirely sure if it is tropable due to being so specific.
Edited by FuzzyWulfeThere are plenty of examples. Most microtransaction games have some variant. The major difference is how hard the line is between the "gameplay" currency and the "premium" currency. In some games there is absolutely no way to convert one to the other, in others players selling premium currency to other players, allowing them to get an advantage in in-game cash and the others to play for free, is a major part of the economy.
"We can handle what is true, for we are already living it."Is "currency is sold for money" strictly a criteria? My mind jumps to World Of Warcraft and the end-game Marks of Justice or old-school armor pieces that you had to get by running dungeons and were the only way to get the most powerful gear, as opposed to the gold/silver/copper that the rest of the gameworld's market ran on.

Is a premium currency in videogames a trope? Seen It A Million Times. We have got to have this one.
Two currencies in a game, typically an MMO. One is obtainable easily through gameplay. The one is obtainable primarily with real money, although it can also often be obtained (more slowly or difficultly) through gameplay, or through trading non-premium currency for premium. Often some variant of "cash"/"gold" and "diamonds" is used.
Often goes hand to hand with, but is distinct from, Bribing Your Way to Victory. Bribing Your Way to Victory is the most common application of the trope I'm looking for, but the trope I'm looking for is about the currency itself, not the uses for it.
Not Real Money Trade. Real Money Trade is when there is only one currency, which is supposed to be only obtainable from gameplay, but some players purchase it from other players using real money. This is about a dual-currency system, with one being sold deliberately for real money by the game's developers.
Edited by MicoolTNT