Explorer's Banner of Geology

Nobody realizes they're reusable yet

Can someone explain to me why this and the Herbology version are not selling on my Realm? No one else is posting any on the AH except me and no one is buying mine. Are they worthless or just unknown it's a thing? TSM is showing the Region Average Price is 4800g for NA, but I can't seem to sell any?

Maybe I am missing the point but...
I don't really see those banners as useful tbh.

It doesn't really feel very comfy to have to put those down for some bonus when mining or herbing.
If it was a buff that you carry with you it would be ok but that seem like one use for one node.

It doesn't seem to make much sense beside maybe in combination with a propagating roused seedling.
And even in that case the bonus remains relatively small in my eyes as these seedlings are so expensive,
that you're better off directly selling them on the AH than using those in the first place.

I reckon I didn't bother doing the math but having to put down a banner, whenever it's not on cooldown,
just to gather a node seems like a lot of time spent for not that much in return.