If it's forever then it is like a perpetuity and it should be worth $5,000.
Now that you said that It could theoretically get cancelled any day then you have to add risk to it.
So what are the odds of it being canceled?
I can't tell you the odds. But what I can tell you is that I have it for over 3 years & it works great!
It's NOT just 5gb per month, like the Companies advertise their devices- & charge $50-$60 per month!
This is an UNLIMITED usage per month, & when I need to switch it to a new device, I switch it without any problem!!!
Its great & B"H I never had any problems with it!!!