Since your 'score' is 68 I take that as authoritative. As someone who has several times contemplated getting on board, only to be deterred by online scepticism, I'm beginning to be persuaded that good quality contributions really might be rewarded, and this business of reputation is a further piece in the jigsaw of how that would work. The problem is getting one's foot in the door, of course, and this I intend to do by commenting constructively before posting content needing time-consuming research. Thanks for the clear information, greatly appreciated by this tyro.