It is my (limited) understanding the Jehovah's Witnesses believe that End Times are coming. After Armageddon, they believe surviving righteous Jehovah's Witnesses and resurrected individuals will have the opportunity to live forever in an earthly paradise, ruled by Christ. Accordingly the Good Lord Jesus will allow 144,000 humans to share his rule in heaven.
With that limited headcount, you'd think they'd be less inclined to show up at the door on Saturday morning trying to convince you to join the pool of potentials. Or maybe they're just trying to up the numbers of the Earthly Paradise?
Somehow I don't think my version of earthy paradise jibes with that of the Watchtower Society.