Hi community et al. Just've noticed an interesting fact -- I'm receiving about 3 invitations per week, and the most common thing about these is that potential clients do not have their payment methods verified. Upwork, I'm not sure what kind of promotion is this.
New clients have the option to invite freelancers to their job posts before they verify their billing method. Feel free to accept these invites and submit proposals, just make sure not to accept an offer until the client verifies their billing method, in order to meet the first criteria for Upwork Payment Protection.