But if they don't make money, they bleed out and disappear.
There's LOTS of small ("boutique") businesses like a lot of independant 2nd hand bookshops, antiques shops, many charity shops etc that have been running for years (sometimes decades), sometimes without enough income to pay the rent, yet they survive.
They survive because the owner is doing something s/he loves, and is not tied to the income from the shop.
Then look at the huge number of home-based businesses where the owner might sell one trinket a week, where they spend a few hours each week making said trinkets as a hobby and if they sell they sell if they don't sell so what.
As to "money being the lifeblood of any enterprise"; no, it's the workers (are you competing for silliest comment of the year?). Without the staff to run the business, even if there's a $billion in the bank, the business is dead the moment the last person decides they're not working there any more.
Get away from your "PROFESSIONAL gamers!!11!!1" for a while and get out into the real world, and get some life experience. This is stuff you learn in the first basic module of Real Life 101.