I think you have answered your own question by pointing out the facts as they stand.
When I see these types of airdrops that immediately claim to be valued at more than $1USD, I just figure they are all scams and forget about them.
Take Surge token as an example - the airdrop I received is now apparently worth upwards of $400USD, but is useless as it can’t be traded.
With any of these tokens, you can check the Trade History on DEX - if there are only buys and no sells, you can be pretty sure it’s a scam and not worth your time.
If it’s still there in 6 or 12 months and there is active trading on DEX, then happy days! But otherwise, I say treat them all as scams.