I took advantage of this nearing the end just to put myself at the 10 million marker. Prior to this I've been making all my gil via normal means (Close to 6 million pre-exploit.) by crafting equipment to sell on the wards. My reasoning was purely simple really, to combat the gil reduction we've got coming into 2.0. I know others who hit this nonstop even when the clusters had dropped. I'll definitely agree that this was some kind of exploit undoubtedly but if I'm going to lose a good chunk of my gil anyway I may as well lessen the impact a little.
And something to think about to those who are saying remove the influx of gil created from this event. The only way this could happen is if they did a character rollback to before the event came out. First off, it's hard to discern just where all the gil came from. It's already begun circulation into the community so you might even already possess some from a sale you did over the market wards. Really there isn't a way to remove it period without harming the rest of the community.
And if you're in favor of a rollback consider this: Doing so will reverse all progress people made in that time frame too. Luminaries earned, gil gained through normal means, level progression, rare drops, etc. Could be easy to say "Well just blame the exploiters." but would you be saying the same thing if say a piece of Darklight gear dropped earlier on in the week and a rollback stole it away from you? I think not.