I'm not sure why you just didn't buy an OCS stamp or two here:
https://crypto.post.at/onchainshop/more info:
https://crypto.post.at/how-it-works/#what_is_onchainI think taciturn is saying you need an OCS stamp in your collection. Not sure about imported physicals. I do it in reverse. Buy onchain, then have the physicals sent to me via metamask. I don't recall it being super expensive, but maybe it was. The ETH network is really shitty lately, so many shit-tokens/contracts lol.
Not necessary to be a OCS to participate in the Onchain raffle, normal physical also works. But I agree, with all the CS2 hassles and security problems, the OCS2.0 are the safest and best anyway. It does not matter if the physical counterpart has also the same security issue, because it does not have private phrases (seed), instead it has a standard German sentence for all OCS: "sammle achievements und begib dich auf die jagd nach dem goldenen einhorn" (translation: collect achievements and go hunt for the golden unicorn).