Board Thread:General Discussion/@comment-151.188.213.179-20130503181934/@comment-28241556-20130923150407

SW8573 wrote:

ItsBloonTasty wrote: Because they are in the Beta testing website. Hmmm, beta players have 0 AP. That's because their account is different from the NK one, or else over 1M players were registered. >_>

And you can earn AP through achievements.