It's been about 5 days since I turned of watermarks on preview videos and it looks like that's going to lead to about a 2x increase in preview volume. I can't say with enough certainty whether that means increased sales yet, but at the very least it's going to move my optimization tasks deeper down the funnel (you can't buy a video until you make a preview). More previews = more selling opportunities.
It also means more load on my render servers. They're still humming along, but this might be a good kick in the pants to finish up that render server rewrite.