Q: Why The (expensive) Price?
A: Everything is stored in-house whenever possible, with minimal interference from third party products/services. I do my own audio and print publishing (this includes CDs), website coding (including paid AND free links/downloads) and hosting, etc. The stuff I leave to third party is stuff like credit-card/etc payment handler and domain registration (because I'm not aware of a DIY alternative to those), and of course stuff like musical instruments and studio equipment.
Q: Why the extra work, then, if third party stuffs like Spotify, SoundCloud, iTunes, etc makes it easy for you?
A: Unfortunately, I had the experience of getting burnt one too many times by third party services. One is one of my music gets copyright-claimed by the third-party service handlers (foreign name) when I try using it on YouTube. The other is DropBox stopping from giving away free sharable links, so I have to rework every single file link. Maybe it's a one-off thing (or I'm just extremely unlucky), but I don't feel like trusting my stuff on third-party services anymore. Oh yeah, I can't sell on iTunes unless I am a U.S. citizen or use third party services (= more headaches...). And the fees. Don't forget the fees (and commission). They may be small, but too much of that you'll just end up with a few cents out of a dollar. Like they say, gotta spend money to make money.
Q: What's the best way to support you (or any of my favorite indie artist), then?
A: The best way is to reach them in person. If you want to buy something, buy from them in-person. Third-party companies like PayPal and Patreon charges a small fee on every transaction. Another way is to support them with your skills. I am quite sure start-up artists need editors, publishers, web developers, and perhaps even managers behind them. But don't expect to be paid by money early-on, though...at least not until actual revenue starts pouring in!