About the freelancer proposals, client select the freelancer based in criteria like job success history on Upwork, qualifications and perhaps country for clutural reasons and timezone coincidence in some works.Sponsored freelance proposals are simply not in the spirit of Upwork, and I like it. The presence of the ability to buy the client first viewing would make me doubt of the integrity of Upwork. And about the client selector, the secret is to bid on jobs that match your experience stated in profile, and to have good Job Sucess Score and good feedbacks.
