Where it comes from
The line in the source
ダイヤはプレイ中の報酬として入手できるほか、有償で購入することも可能 In English
Diamonds can be obtained as rewards in play and also purchased for a fee.
Explore / Figure
Record
Monetisation of the roster, 24 July 2019
24 July 2019
ReportedReported by a reliable secondary source, or read carefully from filed documents.