If you have a game that is worth at least $10,000, you can find the money to get it on Steam. If you don’t think you can find $10,000, your game does not belong on Steam - it’s really that simple. I’ve already said there are many routes to obtaining that fee, such as small business loans, angel investors, crowdfunds, and of course traditional publishing deals. If you find you cannot get one of these you may want to re-evaluate your business plans, as they are probably not realistic.
It’s nothing to do with being rich or poor, there are ways to market if you have a quality product that will sell.
If the barrier to entry for Steam is low enough that everyone can afford to buy in with minimal or no commitment on their part, it’s useless for you anyway, because it will be same barrage of terrible content every day, and your product will be completely buried on the day it arrives, never selling a single copy anyway. This is what is already happening on Steam with a $99 buy-in and Greenlight in the way - there are literally over 100 games being pushed on there daily at present, and nearly all of them aren’t worth the time they take to download.