Just to be clear, is encouraging this type of 'join' message allowed? I've seen it all over and it is always followed by loads of spam while serving no purpose.
5. Post a message in the bounty thread with the following information:
#JOIN
Telegram campaign
Telegram url: https://t.me/username
If it matches the "low effort task" definition (outlined here:
https://bitcointalk.org/index.php?topic=3953664.0) then yes. In this case, they not only incentivised posting via low effort tasks but also incentivized posting in their (now trashed) ANN thread.