you mean their patent grant? How can an open source license like apache, MIT or bsd be "revoked"? Do facebook have a public blacklist of people who aren't allowed to use react?
Apache revokes your rights under the patent section of the license if you sue anyone for patents granted under said license:
> If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this License for that Work shall terminate as of the date such litigation is filed.
Note that the "Grant of Copyright License" of Apache doesn't grant you the right to use the work, so revoking the patent license is effectively revoking the whole license (though you can still redistribute the work).
Correct. Once released under an OSS license, that cannot be revoked. They can change/restrict the license on future releases, but you can also choose an older release, which uses the more favorable OSS license.
Not practically, because once you make a library with an mit license available to anyone, they can give to anyone you didn't "want" to give it to, per the mit license.
you mean their patent grant? How can an open source license like apache, MIT or bsd be "revoked"? Do facebook have a public blacklist of people who aren't allowed to use react?