Man, I feel old when Imgur, a yesterday's establishment from my point of view, can be considered a ’first‘ of anything.
While I also believe Slashdot to be the first one (it certainly is the first one to use the _term_ ’karma‘), some two other early communities to check for prior art are Kuro5hin and Advogato.
While I also believe Slashdot to be the first one (it certainly is the first one to use the _term_ ’karma‘), some two other early communities to check for prior art are Kuro5hin and Advogato.