You will not qualify for a bounty under any of the following circumstances:
- You cheated.
- You had already unlocked all of the tasked achievements for a given bounty prior to its start.
- You did not join any or all relevant Steam groups required for participation in the bounty hunt (always check the bounty announcement for Steam group prerequisites).
- You did not switch your Steam profile settings to “Public”. (Your Friends List and your Inventory need not be public as we do not collect this information.)