You don't need a full 1:1 mirror of the strands, you can probably filter off a lot of the traffic that you don't need to spy on (e.g. TCP overhead) compress it

You don't need a full 1:1 mirror of the strands, you can probably filter off a lot of the traffic that you don't need to spy on (e.g. TCP overhead) compress it and use a fraction of the bandwidth.