El Reg has [1]published a disagreement between a Debian maintainer and Intel
over changes to license terms in the latest CPU microcode updates. The added
terms (see comments) appear to attach liability to both Debian and mirror
sites if the end user violates certain new restrictions regarding
benchmarking. Debian has chosen not to play.

[1] https://www.theregister.co.uk/2018/08/21/intel_cpu_patch_licence/