The couple that had anything to do with making props have all failed but Making Monsters is still on the air but its a limited run type of show... that one guy who made the monsters for B movies and stuff went off after one show, Scarefactory had that thing again off after one year. There was something on home haunters but that didn't make it.
I think Making Monsters is kind of a year to year thing... Travel Channel is big into Halloween stuff they are the ones who keep making Halloween specials so its become part of their thing. I'd bet they'd keep doing Making Monsters as long as they can produce it cheap. But the reality is they are not getting rich off the show, I don't think they are really making much money from the show its taking a bunch of their time.
I don't know if its helped them or not... but I do know their show has been great for the haunt industry. I like Making Monsters and they do a really good job with it.