FYI - this issue seems to be tied to a specific hardware batch of V3 cameras. Two of the V3 cameras that I purchased aprox 1.5 years ago work fine with Alexa live view, while the four V3 cameras that I purchased 6 Months ago all don’t work with Alexa Live view unless I add to a trial subscription as mentioned above.
It sounds like your camera works fine and isn’t subject to the newer hardware batch that some others are having issues with.