Have to love this prepared article. The iPhone 5S is NOT unlocked on launch day from ANY of the options on the site.
The T-Mobile has been updated to only be "Contract-Free" crap. They will unlock it only on their terms.
Clearly you don't know what you're talking about. It clearly states unlocked. Unlocked like T-Mo's iPhone has been. Not sure how you say they changed or altered anything. It's as plain english as can be.