Gold sink: I spend ingame currency to buy a item. This spent gold does not go from my stash to another players stash but magically disappears from the game system.
Examples: pots, gold vanities.
Gold circulation: i buy or sell a item for a certain amount of gold. If i am buyin my gold moves from my inventory to another player's own. If i am sellin gold moves from another player's into my inventory.
Example: Cs, Trades.
As for untradeable primary rewards that is a no go. Majority of contest runners go through the stress in order to win and sell the rewards. Even those that partecipate and have intention to keep their rewards would also like to have available a option that guarantees them to sell them in case of second thoughts.
Add all this together and you will understand making the primary rewards untradeable might drastically decrease the partecipants for the contest and consequently the revenue for the game developers.
Bookmarks