Actually, ambient music can do really well. Infact, the 3rd song I wrote with a buddy under our KTRecords account was an ambient song titled "Lost in Ambience" and it has now over 4,000 downloads. Mind you, KTRecords and myself have pushed out quite a few songs and have gained a bit of a name for ourselves, but like the others have said, you need to become more known.
Participate in the forums a lot, offer to write music for flash games, and you'll start to gain some fans and some popularity, IF, that is, you want it.
We all have to work for our spot to be know. Just keep trying and you'll achieve that, Chief.