You are right on this, and not only with Atomic Wallet. Just check your address on Block Explorer, and you will see that you have received airdrops; all you have to do is claim them.
I just checked one of my addresses on BSC scan, and it shows more than 50 NFTs and token airdrops. All you need to do is connect your wallet to their platform.
More than 50? Holy cow. I experienced the same thing before but the numbers are only small. It sucks as they ruin the image of your wallet and burning them into a random wallet will still cost you a lot of money. What I did instead is just send my legit coins unto a new wallet and then I separate a wallet for airdrops and bounty purposes this time.
Nobody is distributing airdrop with NFT even telling you to claim it, just very suspicious.
I think there is, especially before when the NFT hype is still high. In fact, I got a couple of it but unfortunately or as usual, they only has a zero value. But I don't know, maybe their arrive is only like a souvenir or some form of token of appreciation for participating in the project's activities. We are are only expecting too much.