We will consolidate the LINE@ account plans into the new LINE Official Account plans.
From April 18, 2019, when you create a Messaging API channel in the LINE Developers Console, a LINE Official Account will be created instead of a LINE@ account.
After mid-June, 2019, we will migrate the existing LINE@ accounts under the Developer Trial plan to LINE Official Accounts. The free plan will be applied to the migrated LINE Official Accounts.
Learn more from Migration of LINE Developer Trial plan on the LINE Engineering Blog.