http://www.battlefield-heroes.com/dev-blog/the-first-step wrote:
1. We wanted to return to the crazy unrealistic feel of Battlefield 1942 and Codename Eagle, games which we had both been fans of.
2. We wanted to make sure that players could 'get to the fun' easier this time - faster, cheaper and easier.
3. We were committed to ensuring that the gameplay would still feel like a legitimate part of the Battlefield franchise, with the core elements and feel preserved.
http://www.battlefield-heroes.com/dev-blog/customizations-points-and-missions wrote:
If you decide to invest a few bucks into the game however, you will be able to greatly enhance your gaming experience by adding new super cool customization items to your Hero that will make you unique and stand out on the battlefield.
Items that you will be able to get for Battlefunds could be anything from cool looking clothing items (be it military inspired or something crazy like a full pirate outfit), awesome emotes that will really make your opponent wish he had not been killed by you or convenience items such as the mentioned experience boost.
For those who were too lazy/had no time to find things out for themselves. :P