Having high rewards for bounty hunters like what you were talking about can still be possible to some projects but it is now too hard to attain this days for it is now difficult to find legible and payable bounty campaigns that pay rewards for its participants and also, most people think that joining into bounties are not that profitable at all compared to year 2017 where successful bounties are around the forum which is highly payable and at the same time legible. Starting year 2018, it's already been too hard to seek for bounty campaigns because even if you found one, there is still no assurance that you will get paid for the work you have done. Nowadays there are still existing bounties but only pay small amount of rewards but it is already fine for me at least there are still profit coming from those kind of bounties. I just hope and wish that in the near future, the hype of getting into bounties will rise up once again eliminating those scam projects and only legible ones will remain. Though it sounds impossible this days, maybe in the near future it can be possible again.