There are several ways to purchase support stamps.
You can purchase support stamps with coins.
(1) Purchase from the permanent Support Stamp Shop
(2) Purchase during live broadcasts
(3) Purchase during livecast streams and collaboration streams
(1) Purchase from the permanent Support Stamp Shop
You can do so by navigating to My Page > Services > Support Stamp Shop.
Select the stamp set you want to purchase and click the "Buy" button.
(2) Purchase during live broadcasts
Please refer to this page for more details.
(3) Purchase during livecast streams and collaboration streams
Please refer to this page for more details.