Maybe my information is out-of-date but traditionally home internet connections were heavily over-subscribed - so that "10 Gbps" ISP would transfer at that speed for short bursts, but their business model relies on you averaging <100 Mbps over the course of a week. That's still enough for you to watch 24 screen-hours of 4K video per day - but the reason residential bandwidth was 99% cheaper than commercial bandwidth was that if you routinely used more than 1% they'd cut you off, throttle you, or apply traffic shaping.
teruakohatu asked why a colocation facility would have a mere 10Gbps link when a 5Gbps residential links are so affordable. If you tried to run a colocation facility on a residential link, it would spend most of the time severely throttled.
I should have clarified I am a New Zealander. We get multi-gig connections to home that are not over-subscribed, but I would be very surprised if we could saturate that over the trans-Pacific cables.
