I know that there are other people explained this but I'll just put what I always did to get free ink.
•permanent ink (don't have expired time)
- watch ads (1 ad got 10 ink)
- complete action (every action give different amount of ink)
•expired ink after some time (easy way)
(go to inbox > gifts or messages to find this)
- claim fortune cookie. it will expired the next monday. at least you can get 300 ink and at most you can get 1000 ink
- join event that said "get free ink". expired time is announce at every event information
- read webtoon that said "read for ink" or sth like that. usually they give 350 ink. expired time is announce at the webtoon info
•some webtoon have "1-tap unlock". you can get about 20% discount to unlock the chapters. make sure you turn it on.
This webtoon is drawn by the same illustrator of "They only Remembered Her"
http://www.mangago.zone/read-manga/truthfully_they_only_remembered_her/
the artist said they will stop after chapter 21 and then the season ends. will they remake it from the first chapter or just change the artist starting from season 2?
Whhyy
Oh. I saw. ( ̄∇ ̄")
They will remake it from the first chapter with new artist