Moogle Coins - What might they be used for in the future?

[Solarra]

The new App rewards everyone with Kupo nuts for logging in; this limits the number of times you can access the Market Board.
However, they are also releasing Moogle Coins which can be bought for cash and will allow you to bypass the limit.

Moogle Coins can do the following on release:
- Put items up for sale or revise an item's listing.
- Purchase items

We also learned this, "additional services for use with moogle coins will be added in the future based on user feedback".

I don't have a lot of experience with FtP games and none with a currency like this but I've seen examples of coins in other games being used to make things like Ventures or Squad Missions take less time, or give increased rewards.

So, what 'additional services' do you think they might be thinking of adding to FFXIV and how would you feel about them?

Edit: For anyone who missed the Live Letter here is the screenshot (bottom line) Companion App - New Currency