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So there are bounty hunters and there are those who contribute a lot in bitcointalk..?
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Bounty hunters are very often (mostly) considered as people who came here to make some profit on bounties while spamming many boards doing their signature bounty. Majority of them (of course not everybody) behaves in such way... - use forum only to make bounties and don't take serious part in any discussion...
...buying copper membership doesn't affect bitcointalk income and service level, though it might have some effect on the buyers activity and posting quality level. Thats it
Not exactly - it does affect....
As you can see there are only 357 coppers who earned any merit from 3.200+ group what makes about 11% what is quite low for example in comparison with Members 17% group (i compare them with Members because they are given similar privileges) which you can check here
LINK.
In my post I just want to show that
not every copper member pays for membership just to make bounty, but I still think that this is the main reason for majority of them.