Upwork's Non-Circumvention clause says I can't work for this company outside of Upwork for another 12 months, but does that really apply in my case? They did not come looking for me: they hired an agency to find the best candidate. (Hopefully, me.) And the agency didn't know I had worked for the company before.
It's a short-term job, so I doubt that anyone thinks I'm worth the opt-out fee of $3500 or more.