Horror movie fans don’t usually have the widest selection when it comes to their genre of choice which means that frequently movies like this will get a decent audience of the people who are starved for good scares.
That being said, as long as the movie provides those scares there’s little reason to worry about the rest of it.
While the previous Annabelle movie did not review nearly as well as The Conjuring series that spawned it has done, the fact that horror movies like this tend to have remarkably low budgets tends to make them successful films at the box office regardless.