Use what works best for you and your's. I also have one of the silicone rubber mats from Rockler that works quite well. I use it whenever gluing something above a work surface other than my main workbench that may not be waxed. I decided to buy it after I was given a silicone rubber glue tray and brush applicator and found them to be easy to clean. The dry glue just pops off of them when they are flexed.
Charley
Those of us with slick bench tops have a different problem, things slide around. Mine is poly which is less slick than wax. Still not happy, bare pine would be great and terrible.
can't image fighting the plastic slipping, curling, moving, tearing, etc. maybe no where near as bad as I think
my bench top is rift sawn white oak with three coats of Minwax water based varnish
glue pops right off
top is getting scratched etc, when it gets bad enough will sand down and apply more varnish
What kind of wax matters and if you don't "polish it up", it's not such a slippery thing that causes stuff to move a lot more than without. I prefer the BLO like I mentioned earlier in the thread because it helps inhibit glue from getting into the wood fibers which helps make scraping drops and drips off relatively easy, but with no "build", the surface feels like bare wood which is nice.
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The most expensive tool is the one you buy "cheaply" and often...