10% fee so that I don't have to deal with non-payment issues or even finding new projects would be game-changing for quite a few freelancers out there. But to do this, two major hurdles must be accomplished:

1) Matchist needs to show that they can do this. Waiting for developers to take a leap of faith is a fools game. Show me how you intend to ensure prompt payment, filter out cheap clients, and consistently provide work, and I would gladly pay as high as a 30% fee. But if you expect people to trust a new company out of the blue, all you will get is developers with no other options, and chances are there is a reason they have no other options.

2) Matchist needs to give the clients a way to ensure that they will receive quality work. The clients seeking the work are the ones that can hang themselves out to dry using this system, so what value does it add for them? If you can show only the best freelancers available are picked, chances are very good there will be a line out the proverbial door to use your service. But this is a reputation that needs to be built or clearly explained