Yes you can share information of any good project which will gives airdrop in the future but it should not be in spamming manners. you will see many thread here just for speculation airdrop but if you check all projects are real supported by big exchanges and network. Starknet, ZKsync,Manta network airdrop are already shared here. You should not break the rules of Bitcointalk to share referel link which could lead to temporarily account ban.
You can also post information in your local language board and it should be just for information purpose. just like below
I have found project, partnerships with --- , backup by,,,, airdrop criteria,,,, Total fee,,, expected profit,,,, official site and more details of airdrop