Feldon 
From the EQ2 Forums:
As part of Fall Frenzy leading into our next expansion, we have something special planned for players every week as we lead into our launch.
Starting noon pacific on Friday, September 25, and going until noon pacific on Friday, October 2, 2015 we’ll have double [eq2u]Far Seas Ferrin[/eq2u] activated in-game. This means double DOUBLE Ferrins for All-Access members!
Don’t miss your chance to stock up on Far Seas Ferrin this week!
NOTE: As with past expansions, we do not expect any method to convert this currency into this fall expansion’s currency.
I’ll never understand why they think it’s a perk to give out extra currency when all current stuff will most likely be useless in a week.
What is Double Ferrins?
[eq2u]Far Seas Ferrin[/eq2u]
Reward for doing Altar of Malice content.
So what is Ferrin best used for? I’ve done the content, seen what’s on the Ferrin broker, but I don’t see anything that’s useful to me as a solo player. Is there a list that explains what would be good to have?
As a solo player, there is a vendor now that lets you buy top end Heroic gear for Ferrin.
You can’t buy green gem armor with only plats and ferrins….
Upgrading solo gear. Buying purple adornments.