They will be purchasable inside the game if you got bluecoins on your GG account.
To clarify somethings. We're planning to sell cheap downloadable contents for things that adds flavor and fun to the game, such as spritepacks and music. These will be available cheaply for about 1.99$ worth of bluecoins.
If this works out, we'll be able to fund much longer and bigger support for titles.
(ps, 1€ gives more bluecoins than 1$, as it is tied to the $..)
Oh no.....this feels like E:TW all over again...... Sorry to say but I had not expected this from Paradox.