Usually you see that in repost subs like best of Redditor updates. There's the OP who finds the post and puts it on BORU. When people comment on that post, they are replying to OP, not the person who it is about. So if they have a comment on that post, they would refer to the author of the original post, the original original poster.
LindseySmalls t1_ixoz8qo wrote
Reply to ELI5: Why do people say OOP? by code_ninjer
Usually you see that in repost subs like best of Redditor updates. There's the OP who finds the post and puts it on BORU. When people comment on that post, they are replying to OP, not the person who it is about. So if they have a comment on that post, they would refer to the author of the original post, the original original poster.