The WTS has announced the usual handbill invitation "campaign" for the conventions this year. I haven't seen a copy but I assume that it will be similar to the one for congregation meetings and from previous years. The usual 30 per publisher allocation.
I seriously wonder about the efficacy of these campaigns. While I can see the sense in a local distribution around the convention location , many congregations are tens , even hundred of miles away. And the conventions themselves are primarily aimed at retaining and encouraging existing JWs rather than "interested persons". Imagine someone new sitting listening to a symposium on Malachi , for example. Or the numerous interviews with people who gave up their jobs to pioneer. And even the dramas are very much JW oriented , often quite scathing of "worldly people" who are framed as "bad associates" and usually up to no good.
And as a day out , how will people cope with the lack of any catering facilities , not even able to buy a Coke or coffee?