What I'm arguing is that based on the standard in the post I cited, declaring war and doing nothing in order to get cash at the conference table would be a "gold exploit".
This "standard" you are using is in an unofficial thread and is not part of the HoF rules in any explicit way. That is not an applicable standard to submissions from players who have no reason to have ever read that thread. Using a not-well-defensed argument on an unofficial thread is certainly more biased than reading the actual HoF rules as they currently stand.
The action in question meets both criteria.
It meets the criteria on low difficulties, maybe, although opportunity cost considerations exist even then when your explicit goal isn't killing everyone ASAP anyway.
TMIT's argument that the DoW has a cost is specious; if the AI is far enough away, neither of you can inflict harm and there is no risk.
Please do not cite my arguments while ignoring them, it's annoying. I stated that war has opportunity costs. In doing this, you need to build military or the AI won't want to give you gold, right? Alternative uses for those hammers include workers/settlers (which can attain resources that give you more gold directly). You permanently damage diplo. You give up access to RA with target civ for a long time. These are not fake costs; they're often strong enough to overcome a 250 gold pittance.
Knowing about this tactic, would you attempt to build enough units to make use of it on deity in an attempt to play optimally? You opted not to touch that one too. If a tactic is only strong while given specific constraints via gauntlet, that is not a valid basis to ban it. You could ban almost anything on those grounds.
Again, I make no value judgments about whether or not this should be the case. I'd favor a rule where we explicitly ban certain behaviors and then anything goes.
I'd favor a rule like that too, however for those who *do* make value judgments there should be some gameplay-defensible basis for them.
No, it isn't obvious. Persia is one of the stronger options due to the rapid healing of Immortals and added mobility for melee. However, you have to give up a lot to get that mobility. I'm willing to bet that Mallow used neither of the civs you suggested.
The first civs that came to my mind to do well in this gauntlet were germany and mongolia; the former could take advantage of forced barb luck via game spam, the latter has extremely fast mounted with a fast GG that speeds healing similar to immortals. I can also picture greece or persia taking it potentially.