You can already airdrop onto liquidity pool participants, use the airdrop tool + beet multiwallet, select the liquidity pool share assets as the target of the airdrop.

I'm not sure you'll get the committee issuing NFTs, but it sounds like the ARTCASA gallery's system of enabling users to purchase NFTs on the Bitshares DEX using their user issued asset they sell & distribute on the DEX.

You could also directly airdrop the NFTs themselves onto the pool share asset holders, plenty of NFTEA NFTs were airdropped onto BTS DEX participants, none seem to have been put up for sale on the DEX though as far as I can tell..

It would be interesting for an NFT artist to create long term credit offers which accept NFTs as loan collateral, enabling the NFT holder to always borrow a certain amount of stablecoins from the NFT artist, a smaller value amount than that they purchased it at on the DEX, but regardless a method of providing FIAT liquidity to NFT holders without selling it via a limit order. Plus, the art coming back to the artist to sell once again for full price if the credit deal is not repaid..

I think a major hurdle to overcome, when distributing reward points/tokens, is that people have to notice they've received them, and then they need to perceive them positively compared to scepticism which some spam assets deserve. You need to promote it, market it, then people need to find utility/purpose for it, want to buy it to do something (like purchase limited NFTs I suppose..)

Regularly airdropping, keeping to that schedule and growing a following for said airdrops, getting the airdrop events listed on airdrop alert websites etc - these would grow interest perhaps

I would like to see NFTs from committee/witnesses, any kind of public engagement will revitalise DPOS activities.. I imagine a witness would get votes for promising regular NFT airdrops for example..