Seriously, LINE developers, what have you been thinking? First the disaster with LINE calls showing up in the regular iPhone calling environment, now sticker ads popping up in the sticker preview. I believe it is time for senior management to take a good, hard look at the tools who generate these obnoxious "improvements," and find replacements with an understanding of UI and UX. In the meantime, heres to hoping that the unpurchased sticker pests will disappear as quickly as the option to disable LINE calls showing in the iPhones native history was implemented.
Arkascha about LINE, v6.9.0