When a number of collectors who may not spend as much time as you do with Vacors and cat's eyes and modern Marble Kings get tricked into thinking one of these cheap modern marbles is a CAC or rare Master or uncommon Peltier, we can give a helpful "ahem, this marble is on my end of the spectrum, don't be fooled!"
It has happened a few times over the years. Happened again on Facebook. I was the lone Vacor vote among a sea of CACs yesterday and this morning until a couple of heavy hitters finally found the post a few minutes ago and firmly agreed with Vacor. Glad they showed up, since I was getting my head politely patted, but I did my part.