"the services provided were either outside the usual course of business or performed outside of all the places of business of the enterprise"
Regarding other cab companies, most cab drivers have been traditionally classified as contractors. The idea that Uber introduced this practice is propaganda.
To iterate; the statement sets out two conditions, either of which are sufficient independent of the other, and claims that each of a number of services met one of those conditions.
Usually, when a statement of "choose either x or y" is made, then the only valid options are exclusively x or exclusively y (None and Both are not valid).
Though, when the statement of "if either x or y then do action" is made, then the action is done with any of three valid options: x, y, or x and y (only None is not valid).
To change the second statement to mean the first, you could say "if only x or only y then do action." The "only" cancel Both as being an option.
Either-or does imply exclusive-or, but it is often used less formally, so you will sometimes see it made explicit as "either x or y, but not both."