I have always felt that those bounty reports should have been done off-forum... Either on a dedicated site that was built for nothing but handling those bounty users, or maybe even in a google spreadsheet document directly.
I think they add nothing to the forum, nobody is interested in those reports, nobody is learning from them, nothing is being discussed,... it's just baseless dribble that's basically pre-formatted to be fed to a data-entry drone.
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They add page views, which affect forum ad revenue.
I don't know about the people in the OP, but I think there are a decent number of accounts that can be described similarly as those in the OP that are just in a bot. The bot will make various social media posts, and will post reports about what they posted on the forum. On the other end, those "reviewing" bounty reports are almost certainly bots.
So we have bots making posts, and bots "reading" posts, all the while, the number of page views is being padded.
The cost of a million bounty posts is likely not more than a few cents per month. Cloud SSD storage costs about $0.17/GB/month, or $0.34 for high availability. I don't see a million bounty posts taking up a GB of storage.
I think there are probably an outsized number of bounty hunter accounts that have purchased a copper membership. Copper memberships are priced in bitcoin, however, the price is periodically adjusted to be approximately $30. A single bounty hunter buying a copper membership is going to pay for multiple months worth of storage-related costs associated with all bounty posts.
I don't have a problem with bounty hunters. They generally stay in their section, so I never have to read their posts. So they don't burden me in any way.