Can any experts out there educate me on what Topps test issues are somewhat misnamed, in that they were probably never test-marketed?

It seems to me that the 1967 and 1968 discs are just proofs that never made it to the marketing stage - correct?

How about the 1967 Giant Stand-Ups? Were the non-proof variety ever tested, or is this issue in all its variations just something from Gelman's closet? I know there was a wrapper, but I think I've only ever seen one example.

How about the 1973 comics and pin-ups? I think I've only ever seen (a picture of) one example folded around gum - all the others I've seen have been fold-free. Any reason to think these were ever really tested anywhere as gum wrappers?

Is it safe to assume the 1955 stamps, 1970, 1972 and 1976 cloth stickers and 1966 punch-outs never saw any kind of test distribution?

I think there's some anecdotal evidence that the 1968 plaks and 1961 dice game may have been tested on some very limited basis?

How about the 1970 candy lids? Are they ever found attached to a tub, or with bent tabs? All the ones I've seen have looked unused/unissued.

Thanks.