Probably such batch is added to the profile considering forum rank. For example, someone joins the forum as a newbie, but a batch like Nouv or Newby is added to his profile. If someone achieves the rank of full member, then 10% awesome batch is added to his profile, and if a member achieves the rank of senior member, then 50% awesome batch is added to his profile. Finally, if a member achieves the rank of hero member, then 100% awesome batch is added to his profile.