An update coming to Titanfall will add new in-game currency items that can be purchased through a Black Market. Despite what you may be thinking, this does not mean there are micro-transactions being added to the game (at least not yet).

The Black Market will come in the game's fifth update on July 31. With it will come the ability to buy Burn Card packs and new cosmetic type items for your Titan.
[indent]Where are all these credits coming from? You'll earn them by winning or completing matches, completing the forthcoming daily challenges, discarding and selling burn cards, and for winning the first victory of the day. It's a pretty major shake up which, in concert with the daily challenges, will hopefully provide the game a much needed boost in player numbers.

While insignias are pretty straightforward (you just buy the one you want), Burn Cards will only come in themed packs. While you're likely to get Burn Cards you want based on the category you choose (for example, a Time Boost Pack), you can't select individual burn cards, thus maintaining the value of certain highly sought after cards.

(via PCGamer)