1. How exactly is labor, land, power, or dark fiber lower quality in east Germany (if we ignore the fact that Nuremberg doesn't really qualify for being cheap nor for being in east Germany)? If anything, the subsidies might suggest that operating a business is actually more expensive, which is why it's being subsidised.
5. You are also aware that they operate some 170 Gbit/s of private peering?
6. Which costs exactly are they externalizing with regards to peering in your opinion? So far, your argument seems to be "they don't pay as much as DTAG would like them to, therefore, they are externalizing the difference between DTAG's wishes and what they are willing to pay" - which isn't exactly how you determine externalities.
5. You are also aware that they operate some 170 Gbit/s of private peering?
6. Which costs exactly are they externalizing with regards to peering in your opinion? So far, your argument seems to be "they don't pay as much as DTAG would like them to, therefore, they are externalizing the difference between DTAG's wishes and what they are willing to pay" - which isn't exactly how you determine externalities.