I have experienced with point 4 & 5 in your list, bounty is kinda worthless and i think just wasted time because it’s rare to find out reliable project which will pay end of the campaigns, so many bounties still running in the forum but 99% are SCAM, if somehow you will get their native token but there are no guarantee which will list in the exchanges, so right now it’s not easy way to earn from bounties.