here are no ways to earn gold from untrustworthy gold seller.
you mean bots who spam like 'go to wvvw.not-illegal-gold-in-allods-online.com for 100k gold, only cost 2$' ?
this is able in MMORPG's where you can farm much Gold buy killing easy mobs, where you write a bot for doing that and sell illegal gold with it.
Here in Allods Online where maybe some guys with low lvl and much gold because they were reincarnations.
For the other, they can sell Gold easy with spending money (i think 1 Crystal can get sell to 205g at the moment).
so be sure that you dont saw a reincarnation with much gold, or a guy who spent money for that.