Easiest least luckbased way to make forum gold (that I've found) is Diablo 3.
Get a well geared speed build and sell Bounty Slots. Early season you can get several hundred fg for a spot (maximum of 3slots game)
Later on in season they normally sell for 25-50fg/slot
A well built character can clear T13 bounties in around 30minutes. So, early season you are looking 500-2k/hr depending on what people are willing to pay and how quickly you can fill up the slots and how lucky you were with getting a good speed build going. (Note that it's more efficient to sell T10 games early season. Much easier to farm with low paragon/not optimal gear.
)
Late season you are looking at around 150-300fg/hr depending on what people are willing to pay and how quickly you can fill up the slots.
I haven't hoarded forum gold in years, however every now and then I need FG for the random urge to play D2 B.net or w/e and I'm with on every Diablo 3 season.. I just kick it up, spend a day or two and I'm good to go. =)
All depends on what you intend on doing with your forum gold as well. D2 late season you can build a decent character for as low as 20fg if you are patient.
Goodluck on the hunt!
This post was edited by Deadreborn on Mar 21 2017 03:46pm