Okay, I ironed some Heat-n-Bond Ultra Hold onto the back of a piece of the fabric and ran another cut…
It turned out fine, but the cut didn’t go all the way through the paper on the back of the fusible webbing, so when that was peeled off, the fabric piece was released. (It’s fine - it’s eventually what you do with it anyway.)
So anyhoo…Glowforge logo:
You can just barely make out the shiny webbing on the back of the fabric.
Well okay…not very well…
One thing you do have to be a little careful about with Heat-N-Bond, they have a bunch of different kinds of fusible webbing, and one of them is a vinyl webbing. I would not use that one without checking it out first to see if it is safe to laser. (Vinyls that contain chloride are NOT safe, so as a rule, I just avoid vinyls.)