Just an info topic---I have read many people seeing that their current or ex pwBPD "shows up" as actively on dating websites. Just to have another view, I have a friend who had an active dating profile 4 years ago. Out of curiousity, she looked at the website (without signing in, and by using a public computer, not her own) and was horrified to see that her profile was listed as active and "online now"... .she literally hasn't used it in years. It turns out there have been many complaints about the website "reactivating" old accounts to make the site look busy.
Another friend's computer was hacked, and the hacker "reactivated" her dating profile on a different site (again, that friend hadn't used the site for a long time)---and they even went to the extent of hacking new photos from her computer and "adding" them to the profile. She only found out about it when she logged into an old email account and found "new" emails.
So in this age of technology, it's good to take a deep breath and see the facts before assuming the pwBPD is actually on one of those sites or not