Selling music and SFX packs to asset stores

Hello,

I've uploaded a music pack (and planning to upload more things in the next months) to asset stores: Unity, UE4, Scirra, GameDevMarket.

Since I only uploaded a music pack, I'm not 100% if this can be a succesful business, meaning that I can make at least... 500€ every month from sales on asset stores.

So, the main question is, are developers really trusting this websites to buy music and sound for their games? or they get the audio files from other places?

I suppose that the main target of this stores, regarding music & SFX, is developers that are starting, indie developers, indie companies... and a lot of times, this listed here collaborate with a composer for bespoke music directly.

What are your thoughts? Have you sold music assets or SFX assets to this stores? what is your experience?

Thanks^^