Once a project is posted, Voice123 sends out invitations to voice actors in stages:
First stage - if your profile preferences and the project requirements are a match.
Second stage - Your membership level and your ranking score (a percentage of your Bookings and proposals liked by clients - learn more about the ranking score here).
That means that Voice123 looks through all the voice actors that pass the first stage, rank them by membership and by ranking score, and then send invitations in that order.
Depending on the number of invitations requested by the clients and how soon the project gets fulfilled, you will or will not be invited.