Music used in the official youtube videos

Why do the developers only use fall mountain as the background music in most videos? why don't they use some of gabester's other music? like shattered disillusion for example. Also, he would likely appreciate it if they credited him in the description for the music.

link to his soundcloud: https://soundcloud.com/gabester

 

probably because gabester is a developer and therefore likely doesn't care so much if his own game uses his music without credit

also fall fountain is not used only when it's a new vehicle or map introduction

 

Imagine Beam music on vinyl omg

 

One heck of an album cover