I've been producing content since mid-2017 through my podcasts and YouTube channel. It's a ton of work and like the OP said it takes an emotional toll. Some create content because it is part of their own healing process and at a point they're finished because they just don't have anything left to offer. Others create content and see how much work it takes and decide they'd rather put that time and effort into other things that move them forward in life. There's a lot of drama in the ex-JW community and that can take a toll on people and become exhausting. Let's face it, leaving a cult doesn't mean you're healthy, it just means you left an unhealthy environment, not that you left the residue of that environment behind.
I've had my moments when I was tired too or got exhausted by dealing with toxic people that have come my way. I've always wanted to do it to help other people though and someone letting me know how what I did helped them or maybe Watchtower doing something awful might light my fire again. I've been very consistent, and I've been able to do more and more. Last year I got to speak at a conference and did some work with ICSA. Now I work one on one with people professionally to help them heal and that really gets to the heart of things and keeps me going. I also run group meetups every week. I'm trying to create new ideas for content too as keeping it fresh is a goal. But it's definitely a slog if you want to keep going. I try to stay out of the ex-JW activist drama too and kind of keep to myself as much as possible. But it isn't easy to do something like this long term.