Yeah, this is actually my main source of income, and has been for quite some time now. Me and @Nightstar made a few posts/comments around the forum after the Chrysominter was released, about good ways to do so.
Growth is still a decent choice since you’re getting shimmering orbs you can sell to players, more so if you forge your own 3x3s, but otherwise fossils (i.e. ancient essence) are good too because they’re easily found when mining on certain worlds.
And the amount I get from footfall is pretty small and it all disappears pretty quickly into my request baskets at Nova Golda’s CC, especially since I hoard some materials I am not that likely to use up so soon – what I get from my sales shop stands there is pretty irregular too.
Now give me your quantum footfall skimmer, so I can secretly install it at a few places… 