The agreement has two parts--a development contract that governs the recording and creation of an AI voice (called a "digital replica" in the contract), and a contract that covers licensing and use of said digital replicas to develop a game.
In terms of compensation, voice actors will be paid a standard union fee for the initial recording session to create a digital replica, and further compensation if they wish to allow Replica Studio to continue to use the replica after a certain timeframe. Actors can also negotiate compensation for a replica to be created from previously recorded material, with the minimum payment equal to a standard recording session--this also covers deceased performers, if an agreement can be reached with their estate.
Actors can then license their digital replica to be used in games, with payment calculated per every 300 lines of dialogue or 3,000 words (with "words" also including other sounds such as monster noises.) Studios can also pay actors to get access to their digital replica for pre-production--for instance, using the AI voice for placeholder dialogue. If any of the replica's dialogue is used in a publicly released version of the game, the actor is entitled to further compensation.
They’re going to literally be getting more money for letting a computer talk for them only in the places and ways they allow them to, yet some people are STILL angry just hearing the letters AI and that’s good enough for them.
Jesus Christ, at this point they deserve to lose their work.