But then they can also steal the laptop or mini-pc that is recording. It's also a PITA to setup and manage yourself. I'd rather pay the $50/yr that I do and just have someone else do it. I'm done with the bradlys-as-a-service thing. It'd be another thing adding heat to my living environment as well.
It's been useful for other things like checking in on. Where/when packages are delivered, when the landlord showed up, when a neighbor came over to tell us something but we didn't hear them knock on the door, finding out my smoke alarm was going off for no apparent reason, etc.