@zacchiro @jwildeboer I came here to say this. You don’t have to agree to the other licenses as a contributor. You just have to license your contribution in a way that Redis has the rights needed to use them as sub-licenses.
Contributors that license their contributions under MIT or BSD should not find this objectionable. Contributors that mindfully choose AGPLv3 to advance software freedom likely object.
But sadly few contributors make that mindful choice.