Yes that is the only bounty running which coin was already listed on exchange and it is pretty good coin to hold too but the sad is that it is only for hero members and up.But other bounties are always risky because we never know the exact value of that coin until it get listed on exchanges.
I can't see any other bounty that has a good volume in exchanges like this one. The ranking requirement shouldn't be a sad thing for low ranks, there's also a limit for the number of participants.
Unlike other bounties, you can sell the token once you have receive it on your wallet but like what you said, it's also a good coin to hold.
This type of bounty is rare so if someone manages to join there is luckier than others.