Beatmania IIDX substream Gameplay

Taken from Nico Nico.
Songs played:
1st Stage: m-flo - The Theme from "Flo-jack"
2nd Stage: DJ SWAN - gentle stress
Final Stage: TAKA - Gradiusic Cyber
Extra Stage: NAOKI - Brilliant 2U
My only question is, why the FUCK would you play those last 3 songs and NOT play songs exclusive to Substream (or at least the old songs that aren't revived in future styles)?

[@freecomkcf]

"Are u a beat junkie?
This mode is the true beat for the mania."
i lol'd

[@-Poka-]

Well, *Konmai* always has a bad grammar on their games sometimes, lol

[@Tophbbq]

I like the last 2 measures of Brillian2u's chart.

[@nate567987]

@taitaisanchez It also AC only

[@taitaisanchez]

Theme from Flo Jack isn't in a revival, is it?