BookTook didn't really work for me either. But made some movement on other social media. I thought it would be a good idea to
make a qr code for direct download. So I started integrating these codes into my content (and blog posts). Whenever I post about my ebook, I include a qr code that leads directly to its landing page. It's a simple way for interested readers to access more info or even make a purchase right away. I've also experimented with printing the codes on flyers. Made great partnerships with a couple of book cafe owners. It's a passive way to promote but for now it seems to be effective. And it's easy to track metrics. I can see exactly how many people are scanning the code, when they're doing it, and where they're located.