The product works actually, just that with the black US sync module. It just doesn’t talk to its earlier predecessor. And I think the issue here is that there is no warning on the product page that this device is region locked. When I supported them during Kickstarter, I supported a US product too and it was shipped from US, so I wasn’t aware of any region sensitivity.
Since it works, the only inconvenience is having two sync modules running together, which is fine I guess if one is not picky, aestheticcally.
My other option, aside from returning, is to eBay off my Kickstarter kit and purchase the white Blink cameras from amazon US, so that it all sync to just one module but that’s a lot of effort and cost for some inconveniences.