Clash is such and awesome game....But think about every great game you've ever played. The soundtrack is always UNREAL AMAZING!!
RPGS like Final Fantasy, Adventure games like Mario & Zelda, classics like Double Dragon, Mega Man and Contra
and of course RTS games which are more like Clash,
check out one of the all time greatest video game soundtracks from composer Frank Klepacki for the original RTS 1995 Command and Conquer.
I wish Supercell would invest some serious interest in upgrading its current "Music" which is comprised of boring bird sound effects where im sure 90% of players just disable it. Hire a well known game composer
Hope some of you agree, nothing completes a game like a nostalgic soundtrack!
Honestly, SC has no reason to pay for this sort of stuff. You can just disable it and use a music-playing app. I use MixerBox when I play clash. Not really something worth paying for IMO.