If you’re trying to get a decent rate for your services, you’re likely to have better luck relying on things that are somewhat differentiated by you: your network of past satisfied clients, your particular technical and sales skills, your particular location and ability to be on-site for key meetings.

If you’re looking to avoid all the sales work and differentiated value you can bring, then you can jump on the platforms, but then expect to be compared against everyone else on the platform rather than against everyone for whom a trusted associated has vouched for.