Of/Among more than 540 respondents who have individual public accounts on WeChat, 5 percent claimed that they had built popular "self-media" brands using their accounts, while 12.2 percent said they had made money from the accounts through advertising.

【答】这个问题，我记得网友好像问过一次。

在表示“最高级的范围”概念时，of 和among 意思相同。用于句首或用于句末均可：

You are indeed the cleverest of/among my sons.

Of/Among my sons, you are indeed the cleverest.

相比而言，使用of 比among 更普通。