Most folks don't really use much more data once they get past a certain speed. The ones that do are why acceptable use policies exist as they're either running 'interesting' servers or using capacity because it's there, not for any real valid reason. 
That's one of the interesting things I discovered about how the whole "piracy is theft" thing being mostly untrue.
Personally I pirated a fair few games when I was younger as I rarely could afford to buy anything so had to know I liked it first. I'd try the PC version to see if I liked it then buy on console (as my PC was a toaster so barely ran them), its what got me into Elder Scrolls Oblivion. I remember downloading GTA 3 I think on dialup, it took two weeks, lol.
But I also know of people who just pirated things for the sake of it, they weren't that interested in the content, they just liked collecting things for some reason. They never would have bought the thing they pirated. That kinda confuses me but I guess most people collect something and there are stranger hobbies.
As for speeds, I'm thinking I would probably go for 2Gbit CityFibre but anything faster would just not be worth it. Just moving content over the LAN at faster than 2Gbit is largely pointless as its very bursty so doesn't average out much faster with 10Gbit each end and cloud services I believe tend to be throttled for uploads anyway unless you have an expensive business plan.