I seem to remember years ago some people listing their pronouns by she/her/hers. I think she/her, she/they, he/him, etc. is just a shortening of listing all three while also being inclusive. As you mentioned some individuals are more fluid and may go by she and they but prefer she so it is listed as she/they.
Do people not use a VPN with Usenet at all? I have one for torrents to get my Linux ISOs but I just assumed I should also use one to get my news from Usenet.