Whereas the Asylum had a well-defined audience as a horror-movie company, the mockbuster strategy aims at a broader and shallower demographic: some viewers have seen the real blockbuster and want more of the same thing, no matter how lo-fi; some are genre geeks, interested in low-budget adventure and sci-fi films; others rent the movie thinking it is something else (Web sites are rife with the scornful entries of duped film fans).
Source: wiktionary