Josh Taylor at ZDNet:
Despite the continuing exodus of customers from rival Vodafone, Optus too is experiencing a drop in the number of mobile customers on its network.
Are they going to Optus MVNOs (Amaysim, Vaya, etc.), or just all to Telstra? Probably Telstra.
EDIT: Well they aren’t going to the MVNOs (Josh updated his article to clarify) and they aren’t necessarily going to Vodafone – so yeah, it’s Telstra sucking up the crumbs in the Australian wireless telco market.