[Kyttias]

• Normal currency is obtained from usual site activities (levelling up dragons), etc.
• Special tokens may be rewarded from playing games or solving puzzles to buy special items at a special store that only accepts that currency.
• Cash currency that people buy with real money via PayPal. You may wonder why we need a "cash shop" and why we can't just let users buy virtual goods directly with PayPal - not everyone can use PayPal, but they may purchase an amount of the currency and then send it to their friends as a gift. On many sites, items bought with real currency may be monthly or seasonal items that will never be seen again for sale, making them highly sought after.
• Forum participation points, possibly to be converted into ordinary currency, possibly to buy special items at a special store.
• Item drop currency (we can already sort of do this) - as your pet grows, it may have a chance of shedding something cool, like magical dust, shiny scales, or slightly glowing feathers (or whatever). If you gather enough of it, wouldn't it be cool to trade it in to a special store that accepts that item as a currency?