I mean this is just false. Here's a good Twitter thread on the subject that I highly suggest reading, basically what it comes down to is Packer stock guarentees that the Packers stay in Green Bay, they can't be bought by another owner and moved to a different location. It also lowers the tax burden because there is such a demand for stock. While it is true that "owners" don't make money on that stock that isn't the chief objective of people buying stock, the main objective is to keep the Packers in Green Bay
Ask St Louis if they wish they could have done this to keep the Rams, or Seattle to keep the Sonics. I'm pretty sure those fans would have loved this option