Well, I'm ashamed to say - not very much. Or at least not nearly as much as I would want, as the GM. And it's nobody's fault but my own.
The campaign is supposed to be a sandbox, but due to time constraints and procrastination, I rarely end up spending enough time to prep more than one path forward. There are occasional forks in the path at the end of sessions where I ask them what they would like to do in the next session, and then that becomes the one prepped path for the next session. I'm working on this. My goal is to start prepping earlier so that I have more time to prep different options. Also, prep is more fun when I start 10 days before the next session, rather that 3 hours before it.
Well, I at least appreciate them not trying to spin this by calling it a price "adjustment" or something. They straight up say - in the title, even - that this is a price increase. No BS, no spin, they're openly admitting it and explaining their reasons. Very few companies do this.