Permission for Use and Modification Without Distribution
(1) You are permitted to use the Standard Version and create and use Modified Versions for any purpose without restriction, provided that you do not Distribute the Modified Version.
En español burdo es algo como:
Se le permite utilizar la versión estándar, para crear y para utilizar versiones modificadas para cualquier propósito sín restricción, a condición de que usted no distribuya la versión modificada.
Luego dice:
Distribution of Modified Versions of the Package as Source
(4) You may Distribute your Modified Version as Source (either gratis or for a Distributor Fee, and with or without a Compiled form of the Modified Version) provided that you clearly document how it differs from the Standard Version, including, but not limited to, documenting any non-standard features, executables, or modules, and provided that you do at least ONE of the following:
...
¿No es contradictorio?
¿Qué me estoy pasando por alto?