Doesn't look like it, at least it's not advertised. You can always call/chat and ask if there is an offer for existing customers though
Current bundle offers are found here: https://www.optus.com.au/shop/deals-bundles
Thank you Ray YC....I think that as you are an Optus staff member you need to answer the question....YES or NO and then reference your source. As a result your response is unclear as no answer given by respondents demonstrate certainty.
I have noticed that since I signed up for NBN in November 2018, Optus have taken away my $10 pm discount. I am not happy about this and therefore I will be taking this further.