Win 8.1 castrated (removing MS' spy features - there are some guides /scripts out there) makes even more sense now.
I can't imagine having to live on a metered link, but I can think of all the crazy things I'd do to avoid being on one.
If a normal life involves using credit cards regularly, using a smartphone, using any mainstream search engine, and keeping up with people on Facebook, it is hard to imagine what information isn't already out there.
It is sorta unlimited; I get 60GB per month, then speed drops from 8mbps to 512 kbps. The latter is so slow it makes checking web mail or net banking excruciating. We do hit the speed slowdown from time to time; say if I download a few of TED talks occasionally, or missed soap operas for the wife. The chief consumer is the kid, glued to the laptop and Youtube and whatnot. My needs are more modest than hers. Some years ago, if one exceeded the bandwidth, charges climbed steeply; for instance, if your monthly plan was for say, $30 a month, and if you had Wi-Fi, or even if you didn't and used a hardwired connection, you would get a bill for $1k or $1.5k. This actually happened to my sis in another city. There were big time wars between ISPs and consumers when this happened. Some consumers proved they had to be downloading 24x7 at speeds triple or quadruple of the plan speed to hit those bandwidth targets, and we're talking plan speeds of 1 mbps those days. The ISPs have gotten wiser now and just throttle speed when they decide the bandwidth limit has been hit. Charges stay flat for the month.
I use credit cards extensively, use an Android smartphone (but don't install anything that is a spying risk, like Whatsapp, Uber, etc), use Firefox's Privacy window + DuckDuckGo for "sensitive" searches on the desktop (otherwise G) and don't have an account on Facebook. Data access in my mobile (Wi-fi or mobile) is turned on as needed for a specific purpose then immediately turned off and not left permanently connected. Where I live, data mining isn't as bad as in the US, and I maintain a low profile always. Heck, when I lived and worked in the US, googling my name would get no hits for me, but turn up someone else with my name; even better to have a red herring than have no hits at all!
I realize I'm fighting a losing battle, but I'll keep fighting till the end. I'd rather forego some "conveniences" than bare all. To contradict what I said earlier, there is a chain of sporting goods stores here that is really good. There's one walking distance from my home and we checked it out. I bought a set of cheap ping-pong balls for our cats to play with, with the idea of coming back later in my car to buy some weights and other stuff. At check out, they asked for my mobile # which I refused to provide. He said he couldn't bill without it. I told them to keep the balls and walked out. Needless to say I haven't been back there.