Why Ace Combat 6 has some fighters costs double?

I'd like to post the following comment on 1up, but couldn't...

The cute idolm@ster girl's models may give me a relief from strain in battlefields. But actually they are just expencsive for the people who have no interest for the idolm@ster. They may think why they costs 400MSP? or why such manga-like pictures are on the plains in the serious battlefields?

In Japan, the idolmaster DLC extremely has sold by several fans and the 3rd most sales in the world. The DLC includes costumes, accesaries, extra movies, new songs (Live for you, letest version of it), and so on. They costs 200MSP(acceseries) to 1200MSP(special costumes, extra songs) and the total(both 2 versions) is over 50,000....fanatic.

NBGI launched the painted plains for the im@s players. Then the firm drives them to buy. I believe the idolm@ster is an amusing game and the painted model in AC6 is available for the people cannot reach it. That's the best chance to inform them of im@s. The company might take advantage of fanatic fans and make exorbitant price...