Google reward cards are also greatly applied. Most cell online games can fundamentally use Google gift playing cards for usage; Apple reward cards are similar to Google present cards, and many of the buying malls can use Apple present playing cards for usage. 由於發行商通常投資開發，所以經常試著管理生產者或專案經理人員的開發風險，以監測開發者的進展情況，評論正在進行的開發，和提供必要... waiting for link from Forum Profiles (6)