This synthesis demonstrates your certain understanding. bounty management services are going on the trend of independence, separate. Bountyhive is formed pretty soon. But I like taking part in bountyguru or bountyportals. Each portal has impressive projects.
It seems like almost all bounty portal sites are already here and I just want to add one more site that I see is not yet on list above.
BountySuite a one of new platform and maybe someone wants to try it
Bounty Suite has only recently been developed. Maybe it's too early to evaluate it.