There's a big difference between "indies" (independent games studios), and "indies" (groups of random people on the internet)
This is the key that I've seen as well.
There is an enormous number of people --- including many of those in our forums, in Your Announcements and the Hobbyist Classifieds --- who have zero real chance of ownership having value. The most obvious key is that they are not legal entities with shares to give away. Just people who have a project created in a single afternoon followed up with an email that says "We'll split up the money and all be rich!"
There are a much smaller number of people who are attempting to build the first type of organization. They have business plans. They organize as a corporation. They get written contracts with people who want to contribute. The business plans include multiple projects, and each project has codified plans that include market research and plans that lead to profitability.
That group starting a business tend to be experienced individuals, often in their 30's or 40's, who will tend to invest quite a lot of their own money. Sometimes it is all their spare income from a day job, but also sometimes potentially including getting a mortgage or second mortgage on their home (one person or multiple people) to fund the business. This group will give up ownership shares, but only for those willing to make large investments or to provide critical work when there is no other means of payment available. Giving away ownership shares for this group is a decision made after much thought, and usually made reluctantly.
I've known and worked with a few who have done that. One I know retired about a decade ago after building a studio funded by getting three mortgages on his home (!!!), growing it to over a hundred people, and eventually selling it. Another I know started as a college professor, branched out with his ideas, and now employs about 150 people. Several I know started at igda meetings and such and had a few successful products, sometimes a small number of products, but never could build it into a self-sustaining business. One of my friends (his birthday today, in fact) had his startup bring in around a few hundred thousand dollars before it collapsed. Enough to support him for a few years, but never really transformed into a sustainable company.
That also describes most of the successful startups and small studios. These started as a handful of individuals or even an individual person, and through hard work, intelligent business decisions, and a lot of luck, grew into successful small studios, hiring one, two, then three, eventually five or ten people.
Through a magical transformation one day they suddenly transition from being considered a nobody hobby/"indie" group into being a real professional studio.