What are some alternatives?
When comparing LINE Webtoon and Comixology Unlimited, you can also consider the following products
Tapas - Tapas – Comic, Novel and Stories is free to use digital comic application by Tapas Media that puts tens of thousands of comics and web novel on your mobile device.
GlobalComix - Professional Comics Publishing
Piperka - Webcomics listing and subscription manager
Marvel (Comics) API - Create awesome stuff with the world's greatest comic API
webcomic.app - Add motion and sound to your webcomics.
Key Collector Comics Mobile App - A Resource That Identifies Which Comics Are Valuable & Why