You must forgive Sheo's madness. He can't think straight without Jyggalag :p
But seriously, stop hitting the nail with your fists, man. An x5 player may not make more gold per battle, but he can fight more often than an x1.
It's simple math.
I don't know exactly how fast is an x5 server, but let's assume the x5 timer is one minute without Centurion or Dis Pater Hard. Taking out of the equation the natural human slowness, time to grab food from packages and heal and etc. it's effectively 4 battles while an x1, with Centurion, can do just one.
I'm an L131 and my battles reward me around 1.5~2k without raiding active gold from players. Let's take the smallest amount. While I make 1.5k every 5 minutes, the x5 of the scenario above make 6k. A player working IRL with a headset and GCA addon, attacking every time it "beeps" during an 8h period, makes almost 144k while the x5 above, under the same physical conditions, would make 576k.
Isn't that a big advantage?
What about if that x5 above activates Centurion? His 60s will reduce to 30s. That already doubles the incoming above. What if he uses Dis Pater Hard? Let me assume the time drops to 20s only and those 576k becomes roughly 1.5kk. Now extrapolates for a month. Can you see it now?
I make from 50 to 100kk per month. An x5 on my shoes would make AT LEAST 150kk! And notice that I didn't even mention player raids.
Forging & Melting
Then there are the shorter smelting times. How do you get red gear? Forging (unless you're blessed to get a usable red loot). And how do you forge? With goods. And how do you get red goods? Melting items. Now think, how many items an x1 can smelt compared to an x5?
And I'll go even further.
How do you become capable of wearing on your main character a... let's see, a Gratius or Tiberius' of the Inferno? Levelling up to increase the limit. I make from 1~3 XP every 5 minutes. An x5 player will make at least 4 and up to 12 XP points. It's a little more, yes, but once again, extrapolate this.