I mean seriously: cloud storage of the video may not be "secure", but it's undeniably cool and provides the visceral feedback that the marks want. It doesn't have to be actually useful to have value to its subscribers.
People who are actually worried about break-ins just buy safes and insurance policies. Or move. This is for the nuts.
I was worried about office break-ins, so I bought things that include safes, insurance policies, and Dropcams. These cameras were WAY cheaper than the cameras & services offered by the alarm companies.
And in January this year, the worst happened: someone broke into our office, and took a bunch of electronics. Without the videos from the cameras, the building management wouldn't have been able to figure out how they got in, and police to be able to identify/prove who it was and what happened to our gear.
I'd definitely buy them again. The only change I'm going to make now is relocating the cameras to areas where they'll cover other parts of the office, and add additional cameras as well.