Almost two years without Kingdom hall meetings, conventions, and field service.
It gives JWs some time to reflect.
I also think that the isolation/lockdowns have given people a lot of time on their hands and much of it has been spent sitting at a computer. When they tire of Netflix and look for something interesting on Google it's easy to have some "anti-JW" pop up with all the JW things of interest they might be searching for.
It only takes one domino.