I've only been on Line once or twice. Online, it's Tapas, Lezhin, Bato.to, and comics hosted on their own sites. I've probably bought a lot less of physical comics, but I try to collect my favorites. Namely Akira, Uzumaki, Oglaf, the first three Tank Girl comics...reminds me that I've yet to grab the Fight Club 2 graphic novel.
But yeah...maybe? Not entirely sure how Line works, but I think most people will go for the "free" option if it's available. Those who prefer the feel of physical comics and want to support the creator will. I mean, we have e-books and e-readers, but physical books and libraries aren't dying anytime soon.