the numbers continue to decline …
They have to begin declining before they can continue declining. Unlike the vast majority of churches JWs are holding their own in western countries and continuing to grow in many others. They suffered one year of decline during the pandemic, under 1%, and quickly recovered. Other churches lost huge numbers of members in the UK during the pandemic. Attendance at the Church of England is down by 20% and this may actually turn out to be an underestimate. The Church of Scotland needs to close hundreds of churches in the next few years to cope with the decline.
I have argued in the past that the Internet is a net benefit for WT in terms of dealing with dissidents. In the past when people discovered “it’s not the truth” there was not the easy option of joining a like minded group of people online. Instead they took their issues to their families and friends in the congregation to have it out. This was majorly disruptive in some cases, such as in Calgary where reportedly over 100 JWs left the organisation in the fallout from Jim Penton’s defection. These days that doesn’t happen because people choose to leave quietly instead, make contacts with other ex members, and don’t cause all that much trouble in their congregations.