Every drop counts.
I personally love the concept of Ink. The metaphor of how it's the fuel of writing and drawing (even digital) delights me.
Plus its a cute and cheap way for readers to show they like your work enough to donate.
It's not about the numbers to start with honestly, given how on average like 1200 ink is a single US dollar. But it is encouraging, cause with the messages that you can now write and reply to, it's a new form.of engagement that I love~
I see nothing wrong with feeling generous even if you only give 25 ink.