I used to work for a JW and was friends with their family. It is my understanding it is kinda a requirement to ‘witness’ ie spread the word.
In my experience that ultimately they loved finding people who would give them time just to prove they had been witnessing. They weren’t that concerned if you had no intention of joining the church or not
I have had a soft spot for JWs since being involved with my bosses family. Their family were lovely