Ownership stake in exchange for effort on the project.
So like programmer starts now, and another starts in a year cause so many quit, how will you be able to claim percentage of ownership? And suppose programmer builds something in his spare time and goes onto making his own company and yet your company at same time is developing same ideas, be in the courts for years, and if you not a great programmer yourself, you won't know about the back door someone builds within.
I wish you much luck, I was thinking of what you trying few years ago, but the costs was going to be extreme and never be able to satisfy customers as what they want changes like you breath especially when they paying next to nothing in subscriptions.