Comment by iggldiggl

> Nobody forces you to use the peer DNS.

For practical purposes there's the problem (at least a few years ago?) though that Akamai in particular uses DNS to steer you to the correct portion of its CDN and the default IPs returned by independent DNS resolvers tended to have relatively abysmal peering with the Telekom network that was getting completely overloaded at peak times.

Unfortunately "use <insert favourite DNS provider here> everywhere except for Akamai CDN, for which use the Telekom DNS" isn't something that consumer routers support, so you'd have to start running your own custom DNS resolver to work around that problem…