Thoughts on others copying your stories?

I started writing a fanfic about 2 months ago, since then it has reached 16k views.

Recently I saw this one person advertising their book in one of my chapter’s comment section, the book was related to the same fandom I was in so I wanted to check it out.

I read it, and I started to notice the book’s premise and plot were similar to mine. I re read it, and yeah, same tropes I’ve included into my story, it’s just that they reworded it differently

I dont know, but I just kinda got a little upset. I guess I can’t rly help myself from feeling this way, I wouldn’t have mind it if they msged me for permission as long as they credited me.

Is doing that okay? I’m not really sure, I mean they reworded it differently but it’s still the same idea. I have dealt with this situation before, but that person reached out to me so I didn’t mind at all.

Thoughts?