Your ISP, "mapping your network" means being able to take data that was previously an amalgam of a household and reliably split it into the individual members and devices for better targeting.
The ISPs have the ability to see what is on your network by IPv4 egress. They have been able to do this for a decade.
Worrying that an IPv6 address divulges the network forgets that IPv4 devices betray their existence through DNS, their destinations and other network behavior.
The ISPs know.
2. You can't say anything about the percentage with just the absolute market value. At the very least you need something else to compare it too.
Please, be serious.
So, I mean, I dunno, 2 billion dollars seems serious to me, but maybe we just have different barometers for what counts as "serious amounts of money". Especially considering these devices that are like $300.
Finally, might I remind you of the guidelines? in particular:
> When disagreeing, please reply to the argument instead of calling names. "That is idiotic; 1 + 1 is 2, not 3" can be shortened to "1 + 1 is 2, not 3."
Many of these routers are managed by the ISP using protocols such as TR-069, several ISPs have already been found to not only manage the devices but also monitor certain data including what devices are present.