The client always posts a job and many people send paid proposals to them... But most of the time client never hire anybody else, but he was interviewing 2-5 people without hiring for more than weeks....!
We didn't get our proposal back if no one hires... It happened to me... I have applied to the job that costs (6 connects)... The client started interviewing me... Now it was more than 2 weeks... still the client is interviewing me...)
In general, an interview is always of a minimum 1 day or can extend to a maximum of 2 days just. After this job seeker came to know about their interview results... But here in UpWork, the client took more than 2 weeks and even month, interviewing others without hiring, without any response.
Upwork should also take actions to those clients who posted a job and don't respond. Theirs' last seen should be kept within 2 days, after this their job should be closed and the proposals should return to respective freelancers. By this client always post a job only when they really need to hire someone