I welcome you to the bounty world, where nowadays either you get paid a penny or not at all.
It's not because the hunters wanted to promote them for free, but the team decided to keep delaying the payments or not paying them at all. So either you wait patiently for the payments that only God knows when it will be distributed, or you stopped doing bounties for good. You can't really know if a bounty will pay or not until the bounty ends, or, those bounties are paying the participants on a weekly or things basis.