&gt; So Fastly is offloading the full routing table to their carriers&#x27; router(s).<p>The carriers&#x27; routers will have full routing tables in any case, so Fastly is not really offloading anything. They just aren&#x27;t downloading full routes to a big central router and doing routing decisions there, but rather at a host level.<p>&gt; I feel (I don&#x27;t have direct experience with this setup) like they&#x27;re just offloading some compute power (therefore cost) to the hosts.<p>This appears to be the case. The routing part isn&#x27;t very computationally expensive, the biggest problem at larger bitrates is moving the packets with software. But then again they are already limited by what their CDN nodes can push out, so the routing isn&#x27;t really much more of a burden.