More importantly, this ‘capacity’ isn’t guaranteed. The performance between a sender and a receiver is limited by whatever the most constrained point in the network path is. That has(usually) *never* been the CDN. It’s always been the transit providers peering, your peers total capacity to the peering point, eyeball provider backhaul, etc.
Going from 2x100gb circuits to your Transit provider to 3x100gb seems like you’ve added capacity, but if they only had 8gbps of headroom at peak to a destination, what value have you added to that network?
I, personally, would be way more interested to hear news along the lines of “The transit provider we have 2tbps of capacity to just added 1tbps of additional capacity to Comcast or AT&T in New York, Ashburn and Miami” than a CDN announcing “we added another 5tbps of capacity to the same transit providers globally”.