I think your question has been answered in another thread, but if you bought kickstarter sync modules, those should be considered US devices and will work with cameras purchased in the US.
Blink’s camera’s are officially sold in the US and UK. It’s common for electronic equipment to be region-specific in one way or another to comply with various differences in laws and regulations that vary across the world.
Respectfully, I’m not sure it’s their obligation to inform people using the equipment in countries other than where the products are officially sold/supported. I believe that’s the individual consumer’s obligation to check and make sure it will work in his or her specific country.