I checked them out a while back. They charge $40 fee and buy...

I checked them out a while back. They charge $40 fee and buy your unwanted shares for (I think) a dollar.
That crystallises a loss in the eyes of the ATO so you can claim it as a CGT loss against any CGT gains you might have made. You can carry the loss forward to the next year(s) if you haven't sold anything for a gain in the current year.*

I was considering this too.... but then the DOCA thing came along so I'm waiting to see how that plays out as a "may as well" kind of scenario.

*I'm not an accountant, so best to check with yours.