After several hours on live chat I was able to get Optus to agree to cancel my contract and waive the cancellation fee so I can move elsewhere. There's no chance at all I'm paying a fee to cancel when Optus have decided unilaterally to provide me with a restricted service. I'm sure they realise that they cannot justify their actions to the TIO or ACCC.
I would encourage everyone else to do the same, voting with your wallet is the only language these corporations understand.
Optus have removed the IP blocking which was affecting legitimate sites from the blocking (this was where multiple sites hosted on the same IP were being blocked due to one website hosting the content). This means the only blocked websites are those we are meaning to block.
Optus have always blocked websites for other reasons so if customers have a complaint about a website block it could be either newly added or part of another block, for example to prevent Phishing attacks directed at Optus customers etc.
Please contact us if you have any further questions regarding this.