Well at least for Fly, Thing, and Body Snatchers, I think it helps that they're not remaking previous films really, instead they're differing adaptations of the original source material. Rather than being an endless barrage of "remember this" the movies are all just adaptations, faithful or otherwise, of a story from another medium. Nobody expected the plebs to point at the screen and clap when they saw the monster in The Thing, because the works were more than just recycling the movies made before. Never seen The Blob so can't say if that's the case.