For the marketplace:
The idea is that since we want the marketplace to be unique why not encourage some merchand to sell theirs items in our store. Like a privilege for some of them.
I explain myself: I bought an particular instrument some months ago to an handpan maker. This handpan maker is since accepting litecoin as payment. Which is great but I think that for the "good" merchands we should allowd them to get a privilege of like 5%.
If the merchand is selling one item 150 phr then i would get 5% more ( 157.5 phr). Tax that the buyer of the item would "agree" to accept like a shipping cost.