I was trying to find how slow the throttled speed was in their FAQ and came across this gorgeous piece of language: "Note that speeds may be optimized once an i

I was trying to find how slow the throttled speed was in their FAQ and came across this gorgeous piece of language: "Note that speeds may be optimized once an individual surpasses 15 GB of data usage on the Fi Flexible plan and 22 GB of data usage on the Fi Unlimited plan" "speeds may be optimized"??? Optimized for who?