First person is for more indepth character development. We get to see all the intimate moments of their feelings on each situation.
Third person is better for multiple characters where we can see a glimpse inside their feelings but not on an absolute personal level. Third person tends to be...
I would literally cry if any of my stories were stolen and uploaded for money like this. I've been scraped before to obscure websites that nobody gives a shit for but for scumbags to do this... I hate people.
I heard it goes off of the readers in your story. It recs by the scribblehub readers. If a lot of readers from x story also subs to y story, they must be similar because the same people read it.
When you realize the majority of romance follows the same beats, you can write any romance story. In the end, it's two people falling in love. Good luck. GL.