And this isnt the xp rates.
When you click on the wisps, they become springs.
Not much of a problem, but that means there is no longer any wisp for the other 5 people behind you to click on, so they have to click again.
One extra click, not much of a Runescape Gold problem, but it quickly adds up, especialy when you dont notice it.
I think he means that when everyone clicks on a wisp, only the person who turns it into a spring begins to auto-siphon while everyone else has to click on the spring again to begin siphoning. It gets annoying sometimes.