Wow, that's quite an amazing game for an Indie studio
There's a big difference between "indies" (independent games studios), and "indies" (groups of random people on the internet)
If there's an IGDA meetup in your area, go and see if you can meet these kinds of actual developers.
I'm lucky enough to share an office with something like 20 other indie companies, plus there's a hugely active IGDA group in my city (hundreds of people)... so in my immediate network I've met indies working on an MMO exploration game, a whole catalogue of choose your own adventure books, an arcade weapons racer, a car/tycoon simulator, a speed-run 3D platformer, a space trading MMO, amazingly successful mobile games, successful lone wolves, Syndicate-esque top-down tactics, a "minecraft-clone" shooter, co-developers of a dinosaur FPS, a quake-style arena FPS, and surely more I've forgotten to remember
Many of them are fairly recent start-ups with fairly small teams, which means there's a high likelyhood that the core team members on many of these kinds of projects are receiving shares in the company rather than actual money to begin with.