Unless you're part of the tiny percent of people who run their own router, your ISP can just monitor what goes through your ISP-provided router.
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.