Lots of people who live in less fortunate parts of the world, particularly in areas with high unemployment, probably NEED to sell their bounty rewards to put food on the table and pay their bills.
This may be one valid assumption. Bounty rewards are quite sizeable especially for the less fortunate. If there are less fortunates joining campaigns, then they are more likely obliged to sell immediately due to the reasons you stated earlier. But money does not come easily. They should also learn to really invest some of those rewards rather than consuming all of them.
Do you sell your Bounty Rewards straight away or HODL? Any insight into your reasons would be appreciated.
I usually wait for a month before selling about 90% of my rewards. This is when I try to get the best price from those tokens. This is my strategy for the moment before shifting to long term.