SAG-AFTRA has something called Global Rule One that prevents the union from using sites like ours. It states:
No member shall render any services or make an agreement to perform services for any employer who has not executed a basic minimum agreement with the union, which is in full force and effect, in any jurisdiction in which there is a SAG-AFTRA national collective bargaining agreement in place. This provision applies worldwide.
Accreu provides a character-first voice acting platform for small independent creatives. When a Creator is Casting a Character for a role within one of their Scripts, they're inviting the Actor, associated with that Character, to form a contract with them. If the Actor accepts the invite they are accepting the Creator's offer and forming that contract. Accreu is not a part of this contract - the contract is a direct legal agreement between Creator and Actor.