Thanks for the observation.

Still I do not understand how would they have extrapolated price per GB when considering an unlimited plan. Can that be that they just took the price of the unlimited plan and assumed that's the price of 1GB? That would not be wrong, but a bit deceiving to say the least. Otherwise I would not know how the max price is ~50USD. Swisscom gives me ~15CHF per 1GB, and that is usually seen as the most expensive company.