Amazon Prime movies and Tv shows - 13000 or 3000?

While Amazon claims that is has over 13000 Movies and TV shows eligible for Prime, in reality the list shows only 3092 results when I click on Prime eligible!

http://www.amazon.com/s/ref=s9_hps_bw_clnk?node=2858778011&field-is_prime_benefit=2470955011&page=1&sort=reviewrank_authority&pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-9&pf_rd_r=1G698KPPSGTPSAXD8T3T&pf_rd_t=101&pf_rd_p=1314170002&pf_rd_i=2676882011

What am in missing?

Is this a gimmick?