Is there any way to obtain coins without buying them?
How to get coins without buying them
Nope. Even bonus coins require a purchase of top up or membership. The free currency is fast passes which are gotten through check ins, power stone votes, energy stone votes or purchased through reading points.
The_Synn_of_Wrath I feel the pain ): I'm wonder if leaving the platform or investing some money (it's not a bad idea, it's just that I think it can take quite some money to end just a single story, and making calculations, sometimes it can be a more expensive than just buying a whole novel in some sites). It's something that I haven't decide yet since I'm quite new using the platform and ofc idk yet how many good stories are here or not. 
Ai_Airi it is extremely expensive iv already put in more then 20 bucks for half a book that repeats paragraphs and horrible edits. I feel sometimes it would just be better to stick with my Amazon acct like I hve been doing for 8 years. I love great books but there are times when iys just to much money on this platform which is a shame considering there are some amazing books on here.
Yes, if you are using WebNovel, you are definitely paying to support the authors currently writing or translating the novel. You get the satisfaction of knowing that if you (and the others paying) were not paying, the novel would probably never be finished and available to anybody!
But in terms of pure bulk reading material, the WebNovel novels are 2-3 times more expensive than if they were on Amazon. WebNovel really only has a good mechanism for supporting the ongoing books; they need some fair way to charge for their completed books because they don't have one right now.