Many will say the "spirit" of FlyerTalk is to "share the wealth", so to speak, even if the more that wealth is shared, the more likely the pot of gold will be withdrawn.
When airlines pull $20 international fare or resort hotels $20 a night boners, if only a few dozen people jump on them, well chances are the airlines might let it slide. But when someone posts it and then a few thousand jump...
Of course, some businesses "do the right thing" and honor the fare (British Airways, for example) while others decline (the Bora Bora incident).