Emailed him too, earlier today.
This is what I wrote:
'Hi,
Can I ask you please what these vouchers are?
You seem to have well over 100 of them here and from the description of them they sound very much like the old lounge invites which are no longer valid...
Are you sure these are still usable?
Would you mind emailing me a picture of them please?
Thanks'
To which he replied:
'They are complimentery initations and are 100% valid in all Qantas lounges.'
No pictures though...