@UlrikeHahn
I like the idea of including "paper" and "thread" on tags to distinguish between them.

Also, in my understanding preprints include a short of prior research, thus, the #preprintResearchPaper it seems to me an unnecessary long tag.

Instead, I would go for #PreprintPaper and #PreprintThread for unpublished work/share ideas and #ResearchPaper and #ResearchThread for published ones
@LeonDLotter