There has always been this grey area with people who associate ( and sometimes self identify as JWs ) but never get baptised.
This.
I lost count of how many times, years ago, while out in field serve-us, I'd start my presentation and the householder would say "Oh, hey, I'm a JW too!"
"Hey great! What congregation do you go to?"
[Blank stare]
Turns out they attended meetings back in the 60's and hadn't been near a Kingdom Hall in decades, but they still believe "it's the truth" and self-identify as JWs.