If someone has to habitually hard-stop, then there is a very good chance that they're habitually driving too fast for conditions and/or not leaving enough space to stop in. This data is being used to establish the driving habits of the user - and as such the one or two 'avoid accident' stops will become outliers. It's the habits that push people into the higher risk pools, not the outliers.
Amazon hasn't done anything with Bitcoin - the gift cards are sold by a third-party (gyft.com, IIRC). And gyft only takes bitcoin via a third-party payment processor. For merchants, "accepting bitcoin" in this way is almost identical as "accepting credit cards" with Square as the processor.
Don't assume that the only profit to be made is via the act itself - NASA's space program ended up giving birth to a lot of technology that is widely used in society these days, but could not have been measured in a pre-estimate of the profitability of the space program.
There are too few TOR exit nodes for everyone with a brain to use it. Now if they moved all the actual anti-establishment news to an onion address, then they could know that all non-onion links are propaganda or honeypots.
An important note is that the exit node can see all of "the" plaintext traffic - there's no effective way to track it back to you unless the data contains your personal info. That's one of the biggest reasons that many jurisdictions hold the exit node accountable for the traffic that goes through it.
I used to do that for a 200MB file on on dialup. I think the point is that content sizes are growing rapidly, expecting broadband speeds to keep up. The concern is that people are afraid of the current stagnation, and how it might mean that in a few years, your download of that 50GB patch will take longer than 30-40 minutes.