I have the same problem as Michael_LeBlanc. I set up a Blink system at my elderly Mother-in-Law’s house. My wife and her siblings monitor this system, and it has been working great for the past year or so. We were so pleased with it, I ordered another Blink system and installed it at my elderly Mother’s house, using a different account. This system, too, has been working great, and my brother, sister and I all monitor it. Now, the problem… both of our Moms’ systems have been great, so my wife and I decided to install a Blink system at our house, too. I just bought our new 3-camera system and was preparing to install it, but after reading through the support threads, I realized that due to current limitations (no user controls for a given account, and no simultaneous logins / notifications / monitoring for multiple Blink accounts on a single device / phone), this is not going to work for us. We’d either have to get a third phone to monitor a third account (not happening), or we’d have to add our new system to one of our Mothers’ accounts, giving our siblings access to the cameras at our house (not happening).
Reluctantly, I’ve started shopping for another solution for our house, and will likely be returning this last set of Blink cameras to Amazon.