Wouldn't label it as yuri count as spoiling the ending too? I don't think the author wanted that!
She literally has on multiple occasions said that the story isn't yuri. She is openly spoiling it. The denial gets stronger over time. People say its about not wanting to spoil the story but she has spoiled the story multiple times on twitter. Others say she doesn't like to use labels as if "not yuri" and "girlship" arent just more labels.
I always hated that, move on or just drop the story already.
Funny how you can't manage to do that for negative comments. Take your own advice.
I just find it cute that people hold out hope despite what the author has said.