Main thread won't consist any reflinks. Only description, reflink warning and link to user's posts.
If there's no referral link posted on the thread, then I don't see any violation of forum rules by doing it.
I guess there's some thread with some google sheet of it posted with airdrops yet I don't know if it still updated.
I think OP wants to ask if it's allowed to make a dedicated, selfmoderated thread with reflinks. So the rules are affected.
And we get to the point that I'm not sure if its legal or not for me and for posters in my thread. I would like to encourage BTT community to share good airdrops as soon as possible like above by allowing them to put reflink. Of course all spam reflinks will be deleted by me and all reports that are not made like they should be.
I think the best solution will be to ask your local moderator if he allows such a topic since reflinks are generally not allowed to post. I can imagine that might work, if it's only allowed in a dedicated thread for airdrops and you are keeping it clean but normally it leads to abuse by reflink-spammers.