Just to follow up on my dud kits, Optum agreed to a full refund. In the end it was just a quick to get a local test for me in Greece and cheaper too so it all worked out. I don't think that I'll try the proctored tests again (especially not until they seem to start providing tests with later expiration dates) but I did find the non-proctored ones useful for self-checks for traveling and will for sure use them in the future.