Talk:List of champions/@comment-98.222.250.57-20110911141844/@comment-50.103.6.170-20110912030442

Yup. The idea is that Riot will lower the IP costs of champs that their existing playerbase is most likely to already own. A lot of "has-beens" and old popular picks received this treatment, yet as you point out, not a SINGLE 6300 IP champ has been reduced.

Why? Because those are the champs their existing playerbase are least likely to already own. Ultimately, it's done so that they will retain their RP value via the "Exclusivity" logic.