It's not necessarily the platform itself. Seems ok.
But no one is posting anything anymore and even when they did there was no actual freelance jobs just micro task bullshit and I think that turns people off from using it. Maybe separating microtasks from actual freelance gigs is a good start and definitely need some promotion to bitcoin companies, builders, media creators would be good.
Right now I would be more likely to use stacker news or twitter to offer a freelance gig than microlancer.
Maybe it is as simple as being an addition to the jobs page here on Stacker or on Bitconer Jobs vs a standalone site at this time.