The Seklema mats are definitely ablative. I have one that has been used for hundreds of jobs (maybe a thousand or so, now?).
I tend to err on the side of cutting all the way through the paper vs. protecting the mat. I am also often cutting the same intricate jobs in approximately the same spots over and over, Which is likely harder on it than lots of distinct jobs.
It looks beat up but, still works well. I do have to clean the ash build up off of it regularly.
I have a brand new one to swap in for when it becomes unserviceable in the middle of a run.
I also save the bits I cut off to make it fit the machine. So, I have some mini-Seklema mats that work for some things.
Anyway, my point is that the Seklema mats you are not using will probably last longer than you fear.