[delecti]

A college friend and I both got hired to Amazon in the same round of campus hires. We both accepted Seattle positions, but then between accepting the position and graduating, his team moved to SF, and his offer got increased to compensate for the higher COL there.

Two other situations involved coworkers transferring teams from Seattle, one to Toronto and one to India, both had COL adjustments to their salary.

(Admittedly the evidence is less strong in the latter two cases because they involved simultaneous country changes)