This could have been made clear in a few simple sentences:

We have created a new software license which we are calling the 'Redis Labs License' (RLL), by adding the Commons Clause terms as extra restrictions on top of the Apache 2.0 License. We recognise this will no longer be a true Open Source license, but we consider it a fair trade-off between our business needs and our responsibility and commitment to the Redis community.

From now and in the future, work on the following Redis Labs modules will be published under the RLL: Module A, Module B and Module C.

There will be no change to the licensing of Redis core, and we remain committed to supporting ongoing development under the existing BSD license.